I'm out this month I think

So this is more as a vent. I'm pretty sure I'm out this month. Haven't started just yet but I usually have very distinct starting feelings. Unfortunately they make me think. "maybe pregnant" though it never is. I'm 8dpo if my calender is regulated enough now. I have had heart burn, gas, hot/cold chills, nausea, strong sense of smell, and unfortunately crampy, achy feeling. Not having fun with this and a lil down hearted. Any tips or suggestions always appreciated.