i am significantly further along than you and have had thrush a few times this pregnancy - have used the pessaries each time - as long as you don't feel pain when you insert them, you should be fine - just use at night and don't push too high (use your index finger, not middle finger etc) - i also have the cream for using as mine is both internal and external, so i use a small amount of that like a lubricant.... they are safe - and make things a lot more bearable than a nasty thrush infection!