Hi im 29 yrs old, i had unprotected sex over a month and a half the time i was fertile, in the last 3 week ive been feeling bloated (top of my tummy), cramping, not a normal period flow, spotting for 2 days, tingling, lower back aches , when i did some work outside ive been out of breathe, been going the the toilet often more that i used to, ive five HPT they were all negative, its been 6 weeks since i had my period, its confusing could i be pregnant if the hpt is negative?