I really dont think the chances of pregancy increases. But I suggest either leaving the condom on until your ready to go again or carrying more condoms with you so you dont have to keep using the same one, if your concerned about getting your girl pregnant than talk to her about getting on birth control or some other birth contreceptive, and you, always wear a condom ;) hope this helped
Wrong forum, this forum is HIV specific and you don't have an HIV concern.