left sided vaginal pain-described!

[A1983]

So I had an episiotomy on my right side last July and have no pain at all since. However when we've tried intercourse I have this very localised pain on the left side at the skin by the entrance of my vagina and just inside. The pain is like someone is stretching the skin LOADS, so sharp. Afterwards during an inspection it's definitely redder than the other side and touching it directly hurts, so localised for sure. I went to my Dr's a few months ago and as I was bfing she said once my periods return and estrogen levels return to normal the pain should go. But it hasn't. Any ideas? I will go back to the Dr's next week (easy to put off when you're not having lots of sex! But it's no better so will see her again).