Period questions??? (girls only!)?

Ok so lately I've been having pain down there. Sometimes it will be a little , other times it will make me curl up into fetal position until they go away. Sometimes it feels like gas pain and it's usually in my area, lower abdomen or near my rib cage. Are these pms cramps? Also I get head aches, alotta discharge, (which randomly stopped today) and little pimple like bumps on the backs of my thighs are these hives? I also wake up with a stomach ache almost everyday. Are these pms symptoms? Pls answer. Thank you:)