Sex question!

Does anyone else get an uncomfortable burning sensation after sex.. Happened 4 times so far. I don't have a yeast infection (never had one), we use pre seed (lube), and lots of foreplay but still have a very uncomfortable burning sensation after ejaculation (lasts for about 20 mins then goes away).

Second ovulation TTC and before this for the last 7 years we used condoms and he never finished inside of me.. Allergic to semen? Is that even possible?

Just had my pap in Sept and it cam back normal so no STDs, it's starting to make me not want sex for the first time in my life!!

Thanks for reading and opinions!!