I have been having severe pain like sharp pains in my lower stomach when I go to the bathroom. The past two nights I have woken up and have gone to the bathroom several times but it's very little to almost nothing but I constantly have been feeling like I have to go to the bathroom. There is a little blood too when I pee, however I am getting my period tomorrow. Is the blood because of my period or do I have a bladder/urinary tract infection?