16 & pregnant

I just found out I'm pregnant, me and my boyfriend were best friends for 1 year and then we've been together a month. I'm too scared to tell him and if my mom finds out she'll most likely not let me see him again and she'll force me to do adoption...... my mom is strict, she's apart of the lds church and when I told her I didn't wanna be apart of it she got upset so I'm pretending to be ok with it but she'll get super upset if she finds out I had sex god knows what will happen she'll practically shame me like she does when I do something "bad". Honestly the two options I've considered are aborting it without telling anyone or running away from home and staying with my boyfriend and his mom because his mom said if I ever need to get away from my family I can go there (I'm not aloud to have sleepovers, even with cousins)

What do I do?😭😰

I'm terrified.