Hi, im almost 5 months pregnant. I'm having vaginal pain like UTI plus ichiness inside I used vaginal douche 6 times, what's possible effect on my baby?

Vag itching & prego. Never douche! pregnat or not! you introduce vaginal bacteria into your uterus and/or pelvis. Your vaginal cleanses itself naturally. Have your doctor do a vaginal culture to rule out infection such as bacterial vaginosis. Drink plenty of water, avoid soft drinks or sugary juices and take probiotics that require refrigeration.
Be seen. Your obstetrician can check you for an infection. Most do not recommend douching, particularly in pregnancy.