If you used protection every time then the chances are very very slim to none however bleeding during sex could be cervical dysplasia due to HPV which you can still can get even if a condom is used.
If you read the link there are many other reason why you could be bleeding.
but i use protection all the time i haven had sex without my partner not having condom he always have some friends told me that it might be that my hymen maybe wasnt fully torn
You could possibly have an STD for example Gonorrhoea which you can bleed during sex.
Here are some other top reasons why you would bleed with sex and NO its not normal and you need to be tested and checked by a doctor.
http://womenshealth.about.com/cs/menstruation/a/bleedaftersex.htm