Hubby & i been trying for a year and three months! 💔

Okay this sounds so stupid but, i went to my gyn around November because that’s when I turned a year and they did test to see what other things they could do they did an HSG test to check if my tubes are open and my fallopian tubes are open, but my period have been abnormal for a couple of months so right now I’m on birth control for exactly two months and then I’ll be put on clomid, but the whole point is my period to come and be normal right?around December 24 I had like a period but lasted for a day for like a day and then nothing? My breast feel really sore and all I’ve been feeling like this for two days now i been throwing up, & i am burping so much as well is it possible for someone to get pregnancy while using birth control?