Painful sex 3months pp

So after my 6 week appointment my doctor said I was clear for sex even though when she tugged on the skin that tore it hurt. So a week after that I got some water based lube and tried to have sex with my boyfriend. But it hurt. We tried a couple times after that but he couldn’t get in a little less than halfway without me wanting to cry because it hurt so bad. My Obgyn said it’s because I’m breastfeeding and it’s dry down there and gave me estrogen cream.

My boyfriend says it looks different down there like it was stitched back not the same. And I get that it won’t be perfect again but I feel like she just stitched me to tight. Like if I sit with my legs crossed after a while it’ll hurt.

Of course I’m gonna give the cream a try, but what happens if that’s not the cause and I was stitched to tight? I had a 3rd degree tear btw.