Hey, i am 23, sexually active for a year..

I got my period on 24th of July it ended on 28,

I had Sex on 29 was spotting a bit.. we didn’t use a condom but he pulled out,

And I also took emergency pills “contraplan” on 30th of july..

I took the two pills in one dosage instead of taking a pill every 12 hours I haven’t read the description “this is the first time for me to take emergency pills or any kind of pills” .. and it got me sick with cramps, headache and was about to vomit but I didn’t..

Yesterday 4th of August I found out that I am bleeding a lot, very dark blood, with all the symptoms of period.. seems like I got my period again just after 6 days since my last period ended.

I don’t understand what’s going on, if anyone has an explanation for this help me figure it out