I need help

So for the first time I had sex without a condom. I was supposed to start my period very soon (either the day after of the next). I took a plan b like 5 hours after it happened but I’m worried I won’t get my period. I also am on a new birth control and my doctor hasn’t gotten back to me on if I’d get my period with this brand or not. I have very bad anxiety and get scared all the time. I’m still in college but I’m not sure how long I should wait to see if my period comes or not