My vagina is itchy almost every three daays especially after having sex and it becomes worse just before I start my periods.

I use a condom, I have used different types of condoms but there is no difference. This started last year in June after I gave birth via C-sec.

I have done all tests suggested by doctors (pap smear,diabetis, hiv/aids) and they all came negative i.e. I was told there is nothing wrong. I used the vaginal cream and stopped becuase it is not helping.

Please assist me as this is very irritating and makes me feel very uncomfortable.