Need advice please

Lindsy

I'm 4 days out from my period and am experiencing extreme fatigue, nipple sensitivity, light cramping, and very minimal nausea. I'm 1 month off bc and have taken 2 tests in the last 2 days that show negative. Idk if i should just chalk this up to pms or implantation....hoping its the 2nd one. I'm trying not to be to hopeful just to be let down. Thoughts?