Hi,thanks for writing..
Get a vaginal examination to see for any signs of infection. inflammation and depth.. Depth of the vagina could be the cause of the problem.. If there is no infection, you can use fenton's dilator to increase the depth of vagina.. Intake of food rich in phyto estrogen
like oats, beans, carrot , grapes and leafy veg along with yoga
helps to overcome this problem to a limit.. Hope I have answered your query.. good day..