7dpo according to glow.. any ones else feeling off lately

My last "period " was shorter and lighter than usual and have been feeling a little off since then.. my next period isn't due until the 30th.. so I'm 7 days away from af.. I hope this feeling is a good sign.. I've been feeling nauseous had cramping yesterday and the day before and had a headache yesterday.. what's going on?? Anyone with me?