how effective is plan b if you take it 2 hours after sex and it was around ovula!

Plan B is most effective within the first 24 hours although, as you know, you can use it up to 48 hours after. Therefor, youre timing is good. Ovulation isnt effected by Plan B, so as long as there was no implantation before, you stand a very good chance

No I wouldn't worry, your timing is perfect..typically women don't take the pill until usually the next day or the day after since they figure they have that 72 hour period to take the pill for it to be effective. But the longer you wait the less effective the pill will be, so since you took the pill 2 hours later it will be extremely effective, regardless if your ovulating or not. No worries :)