I am irregular and I have been two months irregular before ..

At this point pregnancy is just in the back of my mind .. but lately my body has been a little different .. I get cold one moment then hot . I am always hungry . I was bloated for two weeks Straight like really really bloated . Then had the poops for another week . Finally right now I have mild cramps and headaches for the last month .. also been very dizzy

I took a pregnancy test a couple days ago and it came out negative .. any thoughts on what it can be !? Or what to do next !?