can you miscarry and not even be aware that you were pregnant?

I've been bleeding on my period for 11 days stopped for 2 days then came back again bleeding isn't heavy to the point where I'm soaking but there's still blood it just got lighter now but it's still there I did not have my period for 2 months and when I was bleeding the first day I just assumed I wasn't pregnant and waited for 5 days till my period ended but turned out it wasn't stopping at all. I've dealt with not having a period in the past but I wouldn't be bleeding for so long. I called my ob and she told me I'm either pregnant or miscarrying but I know that if you bleed you have to have cramps and huge clots I don't have none of that. I'm going to get checked on Monday to see what's the issue I'm just worried