Quick question

So I’m not sure if this is the correct group to post this in, and if it’s not please tell me the correct one, but I found out Friday through a FRER I was pregnant but I was spotting right before I took it and then the bleeding got heavier but every test I take is still positive and I just got my levels back today and they’re just 8 and I go back Thursday to retest but what I’m wondering is if it’s possible for me to have gotten pregnant right before my period and before my body could have enough time to stop my period from coming or if it’s normal to bleed in early pregnancy and still have a healthy baby? I’m scared because I’ve already had 3 losses in the last year or so.