Missed period? Negative test?

Sierra

I was supposed to start my period on January 20 but it never came and still had not. I took 2 pregnancy test one 1/25 & 1/30 (both clear blue digital so no mistake reading it) but as of today 2/1 still no period. I have not changed anything in my lifestyle besides trying to Get pregnant for the past 4 months, no increased stress or anything though. Any suggestions to what’s going on??

Also I have been feeling really tired, super hungry, increase acne, and back pain. But those are common s/s for my period sometimes..

just wanting some other opinions