How many ml's of metrodinzanole vaginal gel should I use for bacterial infection 0.75%? And I get them all the time I no its not an STD im not active

Exact mls not . Important iif you use the applicator just fill it. One applicator is about 2, 5 ml.
Need more info. I would suggest that you take the oral form (a tablet) instead of a vaginal gel. If that does not do the trick after a week then look for another cause of your infection because Flagyl (the brand name of the antibiotic you are using) is not curing the infection if it is an infection.