My periods have been irregular for some time now and my period comes and goes. But for the past 4 months its kinda been going smooth. But this month my period did not come it says that I'm 18 days late and chances of pregnancy are high 11% . I really don't know. I took a pregnancy test it said negative. Me and my boyfriend always have unprotected sex. I've been feeling kinda hot and I'll a lot lately tho. And sometimes i get a Lil woozy from shortness of breath. Idk what could be it. Can someone help me.