Im worried..

(On advance i will just say I will have a hard time explaining this)

So I’m a teenage, i had my first time (ever, unprotected) on the 23rd of October and then again on the 24th (I am on birth control and I know pretty reckless, I regret it) he pulled out and he didn’t cum on either days, because the pain was horrible and I couldn’t continue. I then continued to have unprotected sex on the 7th and the 10th of November. (He pulled out each time with no accident) my pill package ended the 12th and now I’m supposed to have my period from the 12-19th but it hasn’t showed up yet. (Usually it comes on Tuesday which is today) and it hasn’t yet, I’ve had all my pms symptoms and everything. My friends say not to worry but I have issues with anxiety and stress and it’s hard to not worry about this. Could you guys please help me understand what’s going on? // if this helps i have been 100% more active then usual (this month/pill package) and I’m not sure if the fact I started going the the gym and am doing weight training will delay my period? Also I’m 5’5 and 135lbs. Any advice or knowledge will help :) /// I understand to use extra protection now, I can’t handle the stress of not using a condom. So I will learn my lesson from this. //// if you need any other information just ask.