2005 Scion Tc battery problems?

so ive had my scion for about a month and a half now. i just went to the car wash on wed. and as soon as i went to get back in to start the car it was hessitant but it did start. (never happend before) later that night i went to start it again and it didnt start at all so AAA came out with jumper cables and got it started. ever since then its been starting BUT never right away. its not making a clicking sound, its the sound like its going to start but verrrry slow and hessitant still. im not sure if my battery is almost dead (maybe has a short) or if its something else. HELP!