If i make a reservation for a hotel with my credit card is it paid for or just being held with my credit card?

Usually you will have to present your card again to pay. They are just holding your room with your card, but they will charge you some fee if you don't cancel in time. However, some booking agencies actually charge you in advance. You should be informed that this is what is happening. In that case it is best to bring the email from the booking agency, but usually the hotel is aware of how you are charged and only charge you for extras.

Where did you book the reservation? That is a very important first step. The reason is that sites like (Expedia.com, Travelocity.com, Hotels.com, etc.) will charge the entire amount immediately. So if you stayed at XYZ Hotel for $99 per night for 3 nights, they would charge $99x3+taxes. If you reserve the room throught the hotel directly (telephone, or website) they only charge 1st night+tax and the remainder is due at checkin. You have usually 72 hours to cancel before your reservation begins without penalty. If we knew where and how you made this reservation it would make the answer easier as well.