I had unprotected sex with myboyfriend five days afte my period what are the chances of me getting pregnant

Your chances are pretty good if you are having unprotected sex. Now no one here can give you an exact %, but if the sex is unprotected, you have a good chance of being a Mommy.

If this is not what you want, then please use protection.

Well I always say each time is 50/50, since you either will or your won't.
For some, just the first time, does it, for others, it may be dozens.

If you want to have a baby, you have unprotected sex, if you don't, you use protection ( maybe two types)