Help Please!!

Ok so I’m three days late. Never have been late but maybe that happens. I feel like crap most of the time low back pain. I don’t eat much and if I do it goes right through me. My boobs just started to feel funny more sensitive and I just now noticed bumps around my nipples and areolas. My stomach makes noises all the time and pinching cramps. It says I’m done with my period Sunday so should I wait till then to test again?

Sorry I just don’t know why I feel crappy all the time and I’m not sure when to test and how soon.