Approx 4 days ago, and yesterday, I had unprotexted sex with my boyfriend, he did come, but he pulled out just before he shot his full load. My period is irregular, but I've realised It's generally around 5-10th of each month, give or take few days from the 10th. What are my chances of being pregnant from precum/timing etc? Also, is there any changes I can make to my diet that can lower the chances if rid chances completely? Side notes: I should be getting my period over next 2-3 weeks I've worked out, it's normally regular/heavy flow and for about 4-5 days, minimal cramping. Also, I've had no signs or very few signs of ovulation since we've been having sex. I've been sick with a chest infection recently, only taking cough medicine for it, and currently have slight swollen throat glands, no medication taking. My partner has also been sick with a cold/flu Past week or so I've been having Panamax (type of pain killer), that's about it. Could any of those factors change chances or anything?