Feeling odd need help

Aleisha

Since yesterday I’ve been feeling super tired been wanting to sleep a lot after dinner I felt very nauseous didn’t go away for maybe 30-45 minutes after I laid in bed this morning woke up and went to pee like usual then not even 15 minutes later had to pee again and I’m nauseas again and now I have lower back pain but I’ve only been off my period for a week and it was a bad one only lasted 4 days which is very unusual for me anyone know what could be happening?? I highly doubt I’m pregnant considering my period just ended