Rejection by birth family

At the start of 2022, I messaged my biological mother (let’s call her Jane). The main reason I messaged her was for medical history, as when they completed my adoption papers, they took it as a joke and lied about everything. At first I was angry, but I refrained from calling her anything mean. I was upset because my life before this point wasn’t too great (my adoptive father had cancer and was really sick, a relative of mine mentally and emotionally abused me, and I was diagnosed with (possibly) Schizophrenia and OCD and was having a hard time dealing with it.) I felt guilty for my emotions and I apologized to her, which she accepted and said was fine and natural. She then gave me the names of all my siblings on both sides (I was given up for adoption because my birth father (let’s call him John) was married and having an affair with Jane, who knew he was married). She had told me she and my siblings wanted to reunite with me soon. I said that was great, but what I was really there for was my medical history, since my psychiatrist was hastily pushing me to get the info. She and all my siblings denied having schizophrenia, and that the other side had the problems. A few days after I had made contact, John, who was in hiding from his kids and me, made contact with Jane. I was happy, as this meant that I could get his number from her. She denied me this though, saying that “it’s not right” to give me his number. He would never talk to me, but he talked a lot to Jane, even taking the time to flirt with her again. She siphoned out enough info during the next two months which told me that the mental illnesses probably came from his side. I never got a straight answer as to what he had, though, which frustrates my psychiatrist to this day, as they don’t exactly know what type of ‘psychosis’ I have.Anyways, Jane and my siblings on that side kept promising to meet me, saying that they missed me. During this time, I wrote cards for birthdays and holidays, sent them artwork I made with my time and effort, and even sent them money. After a year, they ceased all contact with me, stopped posting on social media, and basically ignored that I existed. This made me mad, as she didn’t help with my medical history, and she gave me a false hope that I could have a supportive family with her and my siblings. She had told me that she didn’t tell her biological mother about me after 22 years, and that she had to “wait for the right time” (which was never going to come). So I thought what a lot of people in the comments thought: she didn’t respect me and my wishes to get my medical history and a relationship, so why should I respect her wishes to keep it secret? So I wrote a letter to her mother, stating who I was and what Jane did. Unfortunately, me, my psychologist, and my parents believe that the letter was intercepted, as my brother promptly attacked me through text, saying I was being disrespectful to her and that I had to apologize. I said no, I will not because I didn’t disrespect her, I was just telling the truth. I got a letter a few days after he sent that message to me, but I know it wasn’t from my biological grandmother. It deflected all the blame from Jane and continued to lead me on with the promise of meeting up in he future. So I let it go for five more months, until yesterday, when, with the advice from my psychologist, I sent another letter, this time with Restricted Certified Mail. This time it can only end up in her hands, and if she still rejects me, at least I tried.Anyways the point is this, your biological family doesn’t respect your wanting to have a relationship, so why should you respect their wanting for you to be not part of your sisters life? It only harms you and the people who are denied the reward of knowing you. Anyways, that’s just my two cents and if it cause you more pain to meet her then don’t do it. I wish you luck.