7 days late on my period

I took 2 pregnancy test and they both said negative, here's one! I don't know what is going on I'm very confused.. don't know if I should go to my doctor idk what to do.. I am not on birth control so it's not that.. what do you girls think and suggest?? I didn't get t at all this month, this has never happened to me🤷🏽‍♀️