I need advice

Hey guys so my period was supposed to start on the 26th and it still isant here. I took a pregnancy test 2 days ago and it was negative. I have had symptoms like cramping and such like I’m going to start but nothing. I used to have irregular periods but the past 4 months they’ve been regular. I’m not sure what’s going on. I’m hoping I’m pregnant but I don’t want to get my hopes up. Our my periods just going back to being irregular? I’m not sure what I should do.