I presume you are female too. It might and it might not. Since it's been a while, it could be a little sore at first...but then after that it would be fine. In my experience it's more the muscles in your legs/thighs that could hurt. I know when I went a few months of not having sex, after I did it really hurt them for a day or so after...walking upstairs etc. Just because I don't work out ans so they had kinda gotten out of shape being used in that way. You should be...worth it!
If you are a female:
Yes and no. I can hurt my girl anytime if I want to. And no, I do not have a huge **** just average guy here. The fact is that an unaroused vagina can be as small as 3 inches long. When the vagina is aroused it can go up to 8 inches long. So make sure there is plenty of for-play.
If you are a male:
I am not sure what to say for you.