I don’t know if I had a miscarriage and I feel so alone

I bleed constantly for 15 days and had other symptoms. I’ve had two periods since then and even if I did have a miscarriage all the physical symptoms are in the past but I can’t stop thinking about it. I can’t tell anyone about it though because I’m only 15 and I feel so stupid for letting this happen. I’ve always thought of myself as strong and reasonable but I’ve messed up so bad and I can’t deal with the idea of my parents finding out because the would hate me. I can’t deal with these feelings anymore. I really want to believe that I never had a miscarriage but I’m afraid I did. It doesn’t matter if I did or not because not knowing is going to haunt me and I can’t stand it anymore.