Is this because of the pill?

I've been on the pill for 4 months, I've mostly been super on time with it, last month I was super irregular(like taking it at different hours) never missed a day tho, but I was on a trip without my bf so I didn't think it was a big deal, as soon as I came back I went back to being regular with it.

Recently I've been super sensitive and kinda sad all day, being mad at my boyfriend over dumb things and over thinking a lot, I've also been getting horrible bloating, is this because of the pill? Or could it be something else? I'm pretty sure I'm not pregnant, because even if we dont use condoms, he never finishes inside, with the pill on top of that the chances are crazy low, so idk