could it be possible?

this gets personal or maybe TMI for some

ok so ive had this nagging thought for the last few months that just keeps making me think i could be pregnant.

i have been getting my periods although its hard to say because my already light periods have been lighter. and its hard to say if there a day or two late because there always between 28 and 33 days apart.

the things that are making me wonder are (sorry to be personal but its the only way i know to explain) i was working out at the gym last 3 mos to no avail. lost 3 lbs the whole time and no size difference at the advice of trainer. have had bad headaches/ migraines like i did w 1st prg. back and hip aches lately. and the TMI one would be i cant orgasm for over a month now, it gets to where its really good then cold turkey skips the climax and goes to the after part and the only time ive had this problem would be during my two pregnancies?could i be pregnant cause ive still been getting my period? i dont want to be wastin money on hpt if its not likely.

any real insight would be helpful or other causes for last problem. thanks in advance for answers