I think I'm pregnant !!!

I'm ONLY 16 pls help I know I shouldn't of done it but now I'm scared and don't know what to do I never thought I would I mean we both didn't know  what we was doing or ATLEAST I know I wasn't and he told me he wasn't a virgin but my experience Was HORRIBLE 🙁 and if he didn't know what he was doing what if he came or idk and people always say precum is stronger and I'm really freaking out I can't tell my mom she will be so disappointed in me I just can't do that to her like I know I shouldn't be done it but I'm really Finna cry 🙁🙁🙁 PLEASE HELP AND GIVE ADVICE