Condom use is almost never permitted, because of the prohibition of
hotza'at zera levatalah, spilling of seed. Unfortunately, while condom use reduces symptoms of semen allergy, it does nothing to treat them.
Before advising your further, we suggest that you see a specialist in vaginal symptoms to be sure this is the correct diagnosis and to explore other methods of treatment including desensitization, antihistamine use or alternative therapies such as acupuncture. Then please get back to us when you have more information.