Hello, I started spotting on Thursday and on Friday I was having heavy flow of blood (heavier than my regular period) on Saturday it was like my regular period and today (Sunday) it's much less.
All this happened about 12-13 days after my period.
Please help, am I having a miscarriage, am I pregnant (I had unprotected sex twice with my boyfriend during my period)

It is possible that you are just having a off period, I will assume you are young and do not know about this yet.

If you had sex (protected or not) you could have gotten pregnant, no birth control is 100 percent, so pregnancy is possible even with birth control.

This could be from many things. There is just no way to tell, if you have had heavy bleeding, you are not pregnant, if you were, there is no way to know.