Question, need some clarity

I have had cramps in the lower part of my stomach now for a day, I have tiny bit of white cervix mucus and tender boobs (like period symptoms)... I am irregular and I am late for my period. I've taken a test and its negative. Here are my questions:
1. Is it normal to have so much gas leading up to my period?
2. The things I've discribed above, does that sound normal to a period that will be coming soon?