Plan B ( generic )

Tanya
Just looking for some advice on this pill, I took it 10 days ago. I think I was roughly about 48 hours ,until my fertile stage was to begin. 
Ovulation has no passed completely, but my
boobs are tender, hot flushes, cramping just not feeling good in general. 
Could this be the pill doing this, or maybe pregnancy? Any advice is much appreciated, getting really scared at this point 😔