Adopted mother contacted me!! What to do next??

Hi, This is my 1st post. I gave up my daughter in 87' (closed). She was 7 months old at the time & it killed me to let her go. I tried to get her back in 89', but the lawyer we hired said nothing could be done. Well, I learned to live with the loss. I remained with the bio father & we had another daughter 5 years later. She's now 18. He passed away & I remarried & now have a son also who's 13. Well, she is 23 now & there is hardly a day that has gone by that I haven't thought of her. Especially when my daughter would say things like "I wish I had a sister & not just a dumb old brother". :o The beginning of May, the adopted mother contacted me out of the blue. Asked for my maiden name & explained who she was. I was floored to say the least! How did she find me?? How long did she know where I live & my phone number? I was thrilled...hope at last! She told me that my daughter was pregnant & due in 5 weeks! At first, she sort of opened with needing medical background etc... & then she burst into tears & thanked me for the gift I gave her & her husband. I tried to remain as calm as possible & was too shocked to cry. I didn't want to scare her off...this was my first chance at contact with my daughter whom I've missed for 23 years! She shared some information on what my daughter looks like & acts like, her new first name, & at one point in the conversation she said that talking to me was like talking with her. I told her that my husband was aware of the adoption but that my children (her brother & sister) weren't yet. I casually mentioned that I was opened to meeting her & of course she said that with the baby coming they didn't want her upset. Fair enough as I also said that my oldest was graduating high school & that I would wait a bit to tell her about her sister. The adopted mother then offered ME her number! I was encouraged! The conversation ended well & of course I immediately took a drive with my hubby & broke down uncontrollably. The month of May went by & I thought of what steps to next. During May, my daughter's grandmother passed away & that added to the emotions of everyone. Well, I told all of this to my mom & unbeknownst to me, she was tracking the births in the paper & found my daughter's full name listed with the birth announcements. It was THE only name listed! My mom gave me a full name! That just meant the world to me. I felt like for the first time in 23 years I had SOME control. All month I was afraid to contact the phone number. I don't know, I think I was too worried it would be a fake number or something. Isn't that silly? :o Armed with the new information & the birth of a new little grandbaby...I just couldn't hold out any longer. I contacted the adopted mother on Tuesday. She picked up & responded to me almost as if she had known me for some time. She told me all about the birth & that my daughter is breastfeeding. I asked about the father & she said that they aren't married & that she is currently living with her adopted parents until she can get on her feet. I'm sad about that. I am sad to hear that she is struggling as a single mom. Oh my the advice & love I want to pour out on her!! Anyway, I told the admother that I would be telling my children the next day & that I know my daughter will want to meet her sister. I also said that if you want to meet me...etc... There wasn't a fast response so I moved on in the conversation acknowledging that as she is recovering from giving birth etc...that breastfeeding & resting should be her main focus in life. The conversation ended well. What do I do now??? After telling my children on Wednesday (they took it very well), I fell apart. Wednesday night & Thursday were the worst. All I could do was cry! Today wasn't much better. I just want to see her & that little baby soooo badly! :( I know I shouldn't be impatient, but all of the years of sadness & loss & regret just came flooding back over the past few days. I'm a mess! My husband thinks I should just call the adopted mom & explain to her a little of how I'm feeling & say that I am anxious to meet her or to at least write to her or send gift for the baby. etc... I'm afraid of calling again too soon & blowing it or something. I was thinking of calling tomorrow & just letting her know that I would like to see pictures of her & the baby & would love to be able to send gifts to the baby. I also want to tell her that her sister really wants to have an opportunity to get to know her. Advice please!!