Hi, I Stopped Taking Birth Control In July And I

Hi, I stopped taking birth control in July and I got my period on August 27/28th I believe. This past week I've been a little nauseous at night and exhausted. I know I've been a little more stressed because of school and I'm probably eating worse than I was. I still haven't gotten my period for this month and I've been getting cramps I thought were going to be my period but I still don't have it. Should I take a pregnancy test or wait for a more accurate result? Would pregnancy symptoms be more obvious than this? Thanks