I am adopted.

My birth mother gave me up when she gave birth to me. Well she asked for money from the family who wanted to adopt me.idk was I sold?. Luckily I was given to a very kind family and really lovable one. My mom and dad who adopted me put me through college and i now have a bachelors degree and a job. One day, my birth mom found me. She made me feel loved and regret what she did but she asks for money. I dont earn that much until one day when i wasnt able to give her money. She suddenly became berzerk crazy like telling me hurtful words. For 26 years she never contacted me. Only talked to me when i finished college and have a job. I find it weird cause my parents who adopted me never asked me for money cause they know im still a beginner at my company and i dont earn much. I havent told them what my birth mom said to me. Do i have a responsibility of my birth mom? I kinda feel guilt cause i wasnt able to send her money. My SO told me in the first place she gave me up and i dont really need to send her anything. She gives me words like

"Oh im still ypur mother and you are my child"
"We are family even if i gave you away"
" i hope you can help me as your mother have a better life"

I have a hard time sleeping and keep having bad dreams cause of what my birth mom said. I feel im an awful daughter. Like it is not my fault she is in her situation. If she didnt do drugs and not have a lot of men in her life she woulve been in a better situation but she makes me feel responsible for sht i dont do.