unprotected

okay so me and my s/o had sex for the first time tonight. i thought he had a condom on but he didn’t. he didn’t cum in me, he pulled out and nutted on my back. today i have a 15% chance of pregnancy during my fertile window though🤦🏼‍♀️ he pulled out so i’m sure i’m fine but i’m still kind of worried because i’m not on the pill or anything. should i be worried even though he didn’t cum in me? i don’t have a lot of cash right now for a plan b pill but is there any other way to stop ovulation? my estimated ovulation date is friday, and since he didn’t cum in me, i think i should be okay