Taking The Morning After Pill

I took a pill last month on the 13th, the week after my period ended.
I got my periods so far and I am worried that I might be pregnant.
The HPT was negative this morning, but ...
But I want to know how can get my irregular menstrual cycle after taking the morning after pill, although my bf didn't cum inside me and there are always chances of pre-ejaculation fluid .... ..

The morning after pill can affect your period. She and offer a few days late or a few weeks late. If you started now you're not pregnant. Hope this helps.

My period has been marred for a few months after I took it. I had my period a week after the pill, which was only two weeks from when I last had it, then it was randomly next month.