I'm 15 and I think I had a miscarriage? I'm scared something could happen to me but I can't tell my mom..?

My boyfriend(17) knew I might be pregnant he was supportive, he's a sweetheart..he was Even a little excited.. Although I don't think any of you will understand that part... We were planning on taking the pregnancy test march 2... 5 days before my expected period after 2 hours of aims testing I would go to his house and find out... Right as my mom came and picked me up my stomach started to hurt a little.. Not too bad I figured just a little cramping that's normal... A few minutes went by and I felt something warm in between my legs and excruciating pain in the left side of my abdomen.. I was crying and told my mom it was just a bad period and to take me home so I could soak in a hot bath... I was a little disappointed to see I was bleeding but got scared it was early and bright red and very heavy...it wouldn't stop coming its never been like this! I couldn't find a comfortable position and I was almost screaming it hurt so badly for an hour and a half! After I took three midol the pain subsided.. I told my boyfriend I think I miscarried hes still sad.. And my friend kaitlyn.. Her mom told me it was dangerous and should tell my mom and go to the hospital right away! I was so scared and still am I'm still bleeding it's like a normal period now.. But iT hurts a tiny bit every once and awhile and I feel nauseated occasionally.. I still cannot tell my mom she scheduled a gyno appointment after my period.. Should I wait til then? I'm extremely paranoid all I've been able to do is cry.. I think maybe it's cervical cancer and I was never pregnant maybe it's an topic pregnancy.. Or I really did miscarry and I might hemorrhage and die if I wait to long to tell anyone???!!! Please help I can't get any answers!!! :(