Hi,
Iam 33 weeks pregnant and from one week onwards I have itching near vaginal lips and light burning sensation during urination. My doctor has given me vaginal suppositories. So if I insert that in my vagina, will the iching will stop? And is it safe to use vaginal suppositories?

IF your doctor gave them to you then it would be safe. At 33 weeks there is no hiding that you're pregnant so the doctor would have known and given you something safe.