Pregnancy/intercourse query

Patient: I had protected sex last night and used a condom with a vibrator toy that was attached to my penis to enhance the feeling. I ejaculated as normal but when pulling out from her vagina the condom came off my penis and remained in her vagina. I could see the start of the condom (the ring part) at the entry to her vagina, meaning the condom was not fully inside her. she also did not move off from her back before i took it out (i removes it within 3-4 seconds of removing my penis) so with the semen still in the condom it did not come in contact with her inside, and even if it leaked it would have exited out the top-ring part of the condom that I could see. the other key fact is that she was on her period. my question is could she have become pregnant from this?