I was scared too, when I found out I was pregnant when I was 15. In fact my first words were "Oh, shit!"
My partner and I split up when I was about 16 weeks pregnant, the stress was too much for our relationship.
I didn't have any family support, as I was not having a termination or putting the baby up for adoption, I was pretty much left up get on with it.
I found myself a placement at a Mother and Baby unit, where they taught us things like baby first aid, baby massage, stuff about weaning, how to pay our bills and budget, and we had things like a rhyme time and stuff like that, with a shared lounge (as well as the individual ones in our self-contained flats) where we used to all meet up, the shared lounge had loads of baby toys that all the babies could play with.
I fell pregnant at 15, had my daughter at 16. SHE is now 15, and I am 31 for another month.
It is scary, and I feel that from what my American relatives have told me, far more so in America.
I went to college from being 5 months pregnant until I was 7.5 months pregnant - I stopped for a while because my DD was preemie - and went back when she was 6 weeks old.
I would have discussions with your teachers about it - you will need to get your GED, find some way to do that.
You will have to get a thick skin to be able to ignore all the nasty comments, it does seem inevitable that you will get some, I certainly did. THEY are the ones with a problem, not you.
I would suggest talking to a teacher that you trust, one of my teachers (and it was one I least suspected would be so kind to me) was a lifeline during the period before I told my family. And after, tbh.