Miscarriage ??!

Can someone please help ! I’m not sure if I was pregnant or not but it seems I’m having a miscarriage on the apps it’s telling me (I’m 3 weeks and 1 day pregnant) if I was pregnant I’m not sure if it’s my period I am bleeding but not as heavy my nipples are sore and hard and having a little cramps ... I forgot I used a boric acid pill it might’ve killed my fetus if I was pregnant I wasn’t even thinking 💔