i have taken about 7 online test and all of them say that it is a high possibility. my symptoms are:

bloating
slight fatigue
overeating (hungry every hr or two, sometimes right after eating) feels as if eating for two
unusual food cravings (ex: love bacon, however ate half a pack in the middle of the night)
tight clothing certain bras and jeans
darker areola and around the nipple
ducts seem more open
achy back
frequent headaches
extreme tiredness
hard to sleep (roughly 7 hr before asleep)
slight cramping

i was just intimate about either the last day of my period or 2 days after. i have an irregular period. my days apart range between 19-35 days. from dec-jan 2012 i was 38 days apart. that was the last time i remember having intercourse up until now. within that course of time one of those months i came on twice. when i try to go to sleep at night it takes about 7 hr. i do not have on anything that could keep me up. when i am going up or down the stairs to class and am very dizzy with headaches. i fall asleep while in class and it's hard to remember things. i did not take a pregnancy test because i feel that it is too early to determine. my boyfriend pulls out beforehand. should i go see a doctor asap?