Period and first time...help

I’ve posted this before:

So I had sex for the first time (using a condom ect) I bled a serious amount at the time and then for a few days after, it’s been about a month and My period is late by 5 days, (I did bled very lightly for about 2 days before my period was due) My period is normally super heavy and lasts about a week... I’m also on the mini pill. Is it normal for me to have skipped a period after your first time?

Update

After about 20 days I got my period but only for a few hours?

What the fuck is going on with my body??