I definitely would recommend seeing your primary care doctor
! From your question, it is clear that you have some sort of rash, but it is hard to tell from your physical description exactly what kind. A trip to your doctor should be very helpful, because they will almost certainly be able to tell right away what is going on just from looking at the rash.
A yeast infection is certainly one of the possibilities. This tends to cause a red, itchy rash which may have some discharge or odor to it. However, there are other rashes that can occur here, including contact dermatitis, which would be a reaction of the skin to something you have come into contact with, such as soap or another chemical. Contact dermatitis can also occur from contact with certain metals that can be found in buttons on pants or in belt buckles. You could also have eczema
, which is a condition in which the skin becomes excessively dry and irritated.
Based on what your doctor discovers, they will make a recommendation about treatment. A yeast infection can typically be treated with topical anti-fungal creams, although oral medications may be more appropriate in some cases. Contact dermatitis or eczema could be treated with topical steroid creams.
Make an appointment with your doctor today.