Birth Control

I just got back from a drive around the city and noticed I was bleeding, even though my period isn’t supposed to come yet for another three weeks almost.

I googled what was going on and of course it says with change of any type of birth control it happens.

I was off birth control for almost 3-4 months before I got back on it (because I moved states/insurance)

Can anyone give me any input, I’m on the pill but the packaging, size of pill and all is way different.