Advice For Telling Mother

Just 4 days ago I found out that I was pregnant. It has definitely been stressful. I told my boyfriend and he told his family, they are all pretty excited about it. Me and my family have always had terrible ways of communicating with each other and I really want my mother to be a part of this baby's life. I am about 2 and a half months from turning 20 and trying to find a job. I am also going to college to become a registered nurse. I want to show her that I can be a responsible adult. I plan on telling her soon but it's so hard to work up the nerve to tell her. I don't want her to be disappointed in me and tell me that my baby is a mistake. I plan on tell her by giving her a gift. I bought a stuffed polar bear and wrote her a note saying how thankful I am to have her as a mother and that I wish I could be just as good of mom as she was to me. Any advice on telling her and not making her flip out to bad? I'm really scared and could use some encouraging words! Thank you everyone! 😊