Sickness

My period is about 1 week late but I'm all over the place with my period some times it come every 30 days other times it comes every 45 days but it's always for 3 days. Anyway recently I got a pinch on my left lower side and ive been very nauseous. I know I should take a test but it's just that my period is crazy. Anyone else had these symptoms. (I know that I wrote this I'll get my period soon)