First of all I will congratulate you for your boldness of representing your generation.
Lubricant is a lubricant, it should not be irritating and that's all. You can use coconut oil and it one of the best. Even a moisturiser xan be used as an option.
Regarding your Dyspareunia i.e. Pain during sex, infection is not the only cause.
Next Steps
Foreplay if proper and given more time will lubricate you properly and many a times helps overcome Dyspareunia
Health Tips
Should not haphazardly run after medicine, rather a good Counselling session will definitely help.