Help I need advice?!

Please help me I need advice

Every time I have sex if I lift my legs on his shoulders it feels like a tear at bottom of my vagina and every time we look at it after sex there’s a graze each time without fail and can’t have sex for days after because so sore! But it feels like a tear!

This has only happened after having my son, I keep having this and it’s affecting my sex life I cannot enjoy it and we always used to have sex like that nothing is any different it’s been like this for 8 months, I feel like I cannot talk to doctors because it’s a nightmare getting through to them due to the COVID-19 pandemic, has anybody ever experienced this? Anything I can do? I just want to have sex without worrying if it’s gonna hurt.