Car crushed my dads arm 😖

Tonight my dad was working on my car, something he has done his whole lifetime. Somehow the car rolled off the jack & the wheel rotor landed on his arm. The only way we could quickly get him out from underneath the car was to lift it. Me and 4 other people lifted it and got him out. I'm 8 weeks pregnant and worried that me lifting on the car is going to harm my baby. Someone please tell me it's gonna be alright, I'm already stressed enough over my dad. 😭