I remember being at 7 weeks, it was incredibly frustrating, but eight months was my penetration mile stone.
As others have pointed out, 7 weeks is early, so relax and try not to let things get you down. I was prescribed 2x 20mg tadalafil per week which although didn't give me any erections at the time, but they do aid nerve recovery.
Could you get a referral to an ED clinic?
Good luck.
Kev.