I did use it during the first trimester but I didn't insert it. I just applied to the outer area and used my finger to apply a little further in, Sorry if TMI.
No, nothing is TMI for me anymore. lol
Well the infection is not just vaginal but cervical too, so that is why I have to insert it. :P lame! but I'm sure it will be fine. Anxious for my next ultrasound!