two periods in two weeks now sore boobs a week after???

hay was wondering if anyone can help might be a bit long but.....have been tryin to get pg for 5 months now with no resaults, im 28 and no kids (had miscarrage at 17) last month had period as normal, have been light for a few yrs now like maybe 4 yrs i think? had period at normal time was a little lighter but right time then about a week later another one it was a lot heavier than normal an lasted longer im only 2/3 days the 2nd one was 5/6 days  and now i have really sore boobs?? i do normaly have sore boob in the week up to my period but never after! was not right after but like 3/4 days after and still hurting at just over a wk after. i have also been a bit dizzy but only after a workout so didnt think much of it but now im not sure could it be pg?? i hopin it is but dont want to do another test without missed period as have done so many in the last five months (im very inpatient) anyone else had this???????????