Could I be pregnant?

My period is irregular so I never know when to expect it but I try my best to track it well I’m 13 days late from when my period should have started... I seem to be looking a little fatter (I thought it was just bloated) and i feel like I could pee more then usual. Other symptoms are a head ache and sleeping more then I normally would like taking long naps and then waking up and going right back to sleep ohh and some nausea... Could I be pregnant?