No Breast Soreness but extremely tired.. pregnant?

[jrkjcds]

I had the mirena IUD taken out a year ago - we've been trying ever since to get pregnant. I was put on medication due to having PCOS and this would be my 2nd cycle on it now. Normally before my period, about a week before, my breasts get very tender, not to the point where they can't be touched but they're sore. I'm less than a week now before my period's due and my boobs don't hurt at all. not in the least. Also I'm totally exhausted. yesterday i had to leave work early just because i felt like i could just fall over and go to sleep even though i had plenty of sleep the night before. I've had 2 children 4 and 6 years ago but i can't remember the symptoms with them for the life of me and i know every pregnancy is different any way. Any chance I could be pregnant? i mean would the change in hormones possibly KEEP my breasts from hurting in the beginning?