ok last month the 13th of september i got my period that friday "the 17th" i went off and me and my boyfriend had sex that same night without protection ok around september the 22nd 23rd 24th and 25th i started feeling sick , i started taking naps in the middle of the day and like some stuff i ate i'll throw it up and around the 27th 28th and 29th i started having these crazy sharp pains that only had lasted a second up my chest and on my sides , the month of october on the 1st 2nd and 3rd when had sex again without protection the on the 4th i started spotting brown then later that same day it turned into reddish brown and it wasnt heavy then the next day on the 5th when i woke up it was still light but later that day it got heavy like water and on the 6th it still was heavy then on the 7th which is today it started to turn back reddish brown my question here is why am i feeling this way? i took a pregnancy test and the results were negative but im still having these problems