Hi, I'm Hoping You Can Help. I Took My Period

Hi, I'm hoping you can help. I took my period on 11th July (only lasted 2 days) & had sex on 13th (condom split). I took EllaOne on 14th just in case. I then very stupidly had unprotected sex on the 15th, although he didn't ejaculate in me. I am worried because I've been having strange stomach pains (it's now day 17 of my cycle). What is the likelihood of pregnancy??? This is all so out of character for me so I'm stressing out a lot over this. Can you reassure me? Thanks in advance.