help please‼️ please read‼️

Alyssia • Soon to be wife to the love of my life, FTM to a beautiful baby girl, blessed ❤️
I am only 18, I realized yesterday night that I was late so I stoped by the dollar store and I got 2 tests and they both were positive, my best friend was with me & when my boyfriend woke up for work I told him, and now today I'm supposed to have a hair appointment with my moms friend to get my hair dyed and of course now I'm not, but I do not know her number so I know when I tell my mom to cancel it she will know something is up, I know I am 18 and she can't really do anything about it I am just so damn nervous, but I do have an OBGYN but he makes me feel really uncomfortable, so I was wondering if I should just go to him or go to the ER & if I am really pregnant they can give me a referral to a good doctor or something, should I just tell her? Or go to the doctor first?
 By the way I am sorry I am 18 & not completely sure how all this works