On the 9th of this month i found out i was pregnant. my hcg level was only at 11 though. the next day i had sex and noticed some brown/red spotting. a few hours later it started getting bright red. then 2 days later i had another hcg test done and it went up to 16.  its now been 4 days of bleeding. although it is not heavy. its a little lighter then my period. Idk whats going on?? Can someone help please!!