Urgent: honest advice please

Yesterday was my ovulation day according to eve. I think I had like 22% risk of getting pregnant. My SO has decided that he's not going to cum unless he's with me and has a condom on. So if he masturbates its not to the point of orgasm. He decided to do this so that if he did have precum there would be less of a chance of it having live sperm in it. I know some men don't have precum and my SO has never seen any come out until he actually ejaculates.We had sex yesterday and for the first little bit he didn't have a condom on. He had it on for the last 75% of the time. 

We've had sex like this before, without a condom for the first 5-10 minutes or so and then he puts one on and I've not ever gotten pregnant. But we usually only do this when I'm not in my fertile window. Yesterday was my ovulation day but I didn't see the notification until after we had sex.

Now the question is: do you think it would be worth it to get Plan B? I'm kind of hesitant to get it since it really messes up your body and hormones. But if there is a big chance I'll get pregnant from yesterday, even though he didn't have pre-cum, I will take it. What are your thoughts/advice? When should I take a pregnancy test? Thank you all.