AF 5 days late

I’m late 5 days my AF was supposed to come apr 16 and i’ve been waiting and waiting since I’ve been having cramps and nausea lately. So me and my fiance tried to test last night and it was BFN. Also, been very sensitive with water everytime I drink water I feel sick to my stomach. Idk if we just tested early or something is wrong? Please send baby dust our way. We are hoping for a 🌈 baby.....