Sex still painful...anyone?

So me & my husband waited until 5 months PP to have sex as we both felt too tired before that and it was a bit uncomfortable at first, yes, but not painful. But two months ago my period came back and after that I started having burning tearing pain during sex, first during just "entrance" but now even when he is inside me. I'm breastfeeding and struggle with dryness but we are using plenty of lube and there is enough foreplay. What could be causing this pain? I used to have a crazily high libido but now it's dead because every time I think about sex I remember the crazy pain and it puts me off. We used have sex couple of times a week and now we barely manage twice a month. No weird discharge, no pain otherwise apart from when having sex. Sometimes it does sting when I pee after sex but it goes away after a day.

I've had vaginal delivery with episiotomy & epidural if that changes anything.

Any advice :/