Risk of pregnancy - #10298

Hello Doctor, I am worried about pregnancy and want to explain my situation clearly. First, we only did foreplay. I wore a condom and there was no penetration. While wearing the condom, she gave me a hand job and ejaculation happened inside the condom only. I removed the condom immediately and threw it away. After that, foreplay continued (kissing, touching only). Later, I wore a new condom and there was some external rubbing only, still no penetration. After a short time (around 20–30 seconds), I removed the condom because it felt uncomfortable. There was no ejaculation during this time and the condom did not break. After that, foreplay continued again. Much later, there was light rubbing without a condom, but only over her underwear (panty). There was no direct skin-to-skin genital contact and no penetration. Fingering was also done only over the panty, not inside the vagina. No semen was released outside the condom at any point. Her periods are usually irregular. Last month they came around the 18th. This month they were expected around the 17–18, but today it is the 20th and periods have not started yet. Please tell me if there is any possibility of pregnancy in this situation or if the delay could be due to stress or irregular cycles. Thank you.