Very sore breasts and feel big after taking Plan B?

So this started last week, I usually take my regular combined (Mirvala 28) birth control pills at 10 pm everyday. I’ve never missed one and been taking them for over a year. 

Monday comes, I take my pill like normal but I completely forgot about Tuesday, and when I went to take my Wednesday pill I noticed that I forgot so I took 2 pills right there at 9:50 pm on Wednesday, slightly less than 48 hours after my pill on Wednesday.

I got so paranoid because my bf and I had unprotected sex the day after and he did not pull out, I went a got a Plan b and took it 15 hours after that sex.

That was 2 days ago I took the Plan B at around 1 pm on Friday. Boobs have been really sore and feel swollen, slight cramps and a bit of nausea but not much at all and no bleeding. I’ve been taking my pills like normal since then and I just finished my active pills yesterday, took the last one at 10 pm and now today is my placebo week.

Am I okay? Are these just symptoms of the pill?