Pre pregnancy test symptoms

I have been on the pill for a little over 10 years. Ive been off it for a month. My offical pregnancy test day is tomorrow but i took a test today because my uterus was feeling different. My test was negative but could it still be early? I dont remember how regular my periods were before starting the pill, so theres a chance my period doesn't even start tomorrow. But did anyone else feel different before testing? I dont have sore breasts or anything. Just my uterus feels different