 [ Symptoms ] why am i so tired and exhausted all of the time  energy levels are seriously non existent tired and exhausted feeling all the time gaining weight and can not seem to get it off no matter what or how little i eat [ Disease ] sure you can even have sex when you are not ovulating of course having unprotected sex during ovulation is how you get pregnant so if this is not your goal right now or if you are not on an effective method of birth control many women will avoid sex during the only time of the month that conception is highly likely