Questions kinda and maybe TMI

So ladies I’m predicted to start tomorrow however the past few days I’ve been pretty nauseous. And 90% of the time I start cramping the week before I’m supposed to start and my boobs start hurting. However last week I had no cramps and my boobs didn’t hurt what so ever. Now Monday my nipples started getting tinder to the touch, and today I’m having a hard time with trying to keep my breakfast and the two bottles of water down. I’m not really stressed over it but I’m scared to even think about going to get a test because with my PCOS I always get let down but I’ve never felt like this. What do y’all think I should do?