Plan b side effects?? (Stupid decision) help!!

I had sex last Thursday with my boyfriend. I had started my 8th pill pack two days before and was still on my withdrawal bleeding on Thursday. He peed before we had sex and he used a condom and pulled out with the condom on and we checked it with water and it was fine, no leaks. I took a plan b the next day(Friday) because I was scared I messed up my pills by having them with me in the car for two hours. I really thought I needed the plan b because I left them in the car and it was like 84 degrees outside. Well on Saturday I got a new pill pack because the pharmacist said they are probably okay but i could get a new pack if I wanted to. I started the new pill pack and today my nipples are sore. I know my boobs usually get sore the 2nd and 3rd weeks of my pill pack and I’m supposed to be on those weeks in my original pill pack. Im on a monophasic pill which means I get the same dose of hormones every day. Could hey hurt because of too many hormones??? Please help!