Lately ive been having body pains, lower abdomen pains, fatigue, my breasts are a bit sensitive but dont hurt, back aches, nauseas but i never throw up. I always had unprotected sex with my boyfriend of 2 yrs and we've never gotten pregnant. Im also super irregular. Meaning i get my periods almost every 6 months. My last period was on the 5th of june. We had sex on the last day of my period which only lasted 4 days n my periods normaly last from 6-7 days. Then the weekend after that and the weekend after that and so on. My last time was this past sunday and today I noticed a brownish spot in my underwear. Can I be Pregnant?