I just turned 21 this month and went to the gyno for the first ti...

I just turned 21 this month and went to the gyno for the first time just before my birthday. she gave me a trial pack (one month) of loestrin. a few of my friends are on yaz and told me about the horrible side effects, so i figured this one would be better since it's the lowest hormone dose and my body is super sensitive. i started them last week and since then i've been even more moody than usual, go into these random bouts of hysterical crying for no reason, and the worst part is that two days ago my "breakthrough" bleeding started- only it's not just spotting, it's basically like a full-blown period. i got blood work done (almost a month ago) at the gyno's, and i called last night because i hadn't gotten a call since. waiting to hear back this morning because there was a slight abnormality with the pap smear.. needless to say i'm pretty pissed with this doctor for not following up, and for leaving me in anxious suspense about what's wrong with me. is this normal to bleed like this? i went on birth control to regulate my severe, debilitating periods, and now i feel sick and have been bleeding for the past two days pretty heavily. :( really disappointed & upset.