Weird period?

Taylor

So my period started 7 days ago. BUT it lasted for 4 days, stopped for 3 and now it’s back with cramps and heavy flow and I honestly don’t know what’s going on. Does it have to do with my birth control? I was on the last 3 of the hormonal pills when it started and then the reminder pills. I just know I am wearing my period panties and shorts under my scrubs today and I’m upset cause I thought my period would be shorter with the new BC.😒