Should I Have An Increase In Mucus Before A Period I Need Opinions...Im Loosing My MIND!!!?

I need opinions...Im loosing my MIND!!!? - should i have an increase in mucus before a period

My last period was on 2 March. I am with my irregular cycles. We have attempted, 25 March, 26 Today, March (twice). I know that I was too late to try, but we said, Oh, what the hell! it must be on my last round in February, that my time has come 31st March. My breasts are not as painful when I have my period, I am a little tired, but I make a lot of nausea ... I also noticed an increase in the cervical mucus, but the white and thick (sorry TMI). As a rule, before my time, I am quite dry and alittle cramping but not like menstrual cramps .. are a little more ... Took a test was neg, but I think if I am pregnant, would have tried to principles than we do. Does anyone have an opinion? Oh, and my speed anywhere from 28 to 45, run the shortest to the longest.