hi, this is a very embarrassing question.. i am 28 yrs old.. and as long as i remember if i have to pass gas and i am sitting ie my anus is blocked.. only then the gas will come out of i think my vagina or urethra .. i thought that is not normal until i casually googled it last week.. if it is a fistula i do not know know how that is possible as none of the reasons listed are related to me . also, i have vaginismus .. are these two problems related in any way ? and i am using vaginal dialators since a few weeks to help solve the problem.. now i am scared if there is a fistula, will it get wider if i use the dilator have intercourse ?

please help

thankyou