Hii , Welcome To HCM & Thanks For Asking Your Query Here from the medical history you provided it seems that you might have vaginal yeast infection (vaginal candidiasis) , however it may also be caused by Bacterial vaginosis ,Sexually transmitted disease (STDs), Chemical substances ( creams, condoms, contraceptive foams, laundry detergents, soaps, scented toilet paper etc. ) But seriously it needs thorough medical check up to spot a confirm diagnosis as you said u gym daily ,your vaginal area become moist easily and moist and warm area is best place for yeast to grow ,so it is important that you keep ur vaginal area clean and dry , For Further prevention Of the Condition please Read this- As yeast loves the warm, moist condition of the vagina so if you wear Synthetic underwear, switch to cotton if you wear Pajama bottoms, go bare instead for better air circulation to the vaginal area while you sleep if you wear Tight jeans or spandex, swap them for more breathable materials however u can apply anti fungal creams and ointments along with above precautions but i would suggest u to get it examine before taking any medication I hope it help Thanks & Get well Soon