pregnant?

so i have been on BC for a little under a year and recently i had to go on a course of antibiotics. i’m aware that this can lessen the effectiveness of the BC, but not thinking there was one time during my period that my bf didn’t pull out (no we don’t use condoms). i’ts only been a couple days since my last period, so i won’t be able to reliably test for at least a couple weeks. i’ve been noticing little symptoms like bloating/ tightness, random cramps, not sleeping well, and light pinkish spotting after i thought my period was over (though i could have been wrong about this). am i experiencing just random hormonal side effects from getting off my period? or how likely is it that i could be pregnant? i know that you guys aren’t doctors but i’d like to know what you think especially if you’ve been pregnant before.