Need help! It's urgent

Zareen

I hope everyone is doing fine. Need ur guidance please. I have been trying to conceive for 1.5 years but fail due to less frequency of intercourse by husband once or twice in fertility window( doctor suggested to have intercourse every other day during fertile window). I need to know is it necessary for the penis to be full hard and rigid to get a lady pregnant? My husband had low testosterone levels which lead to erectile disfunction. He has been taking supplements and T-injections, now the frequency of intercourse is being improved since last month but the penis doesnot get fully hard and rigid. It remains a bit soft in erection when I hold it but husband manages to enter it in the vagina. Can I get pregnant in this condition? Also it is inclined to left. Please suggest asap Thanks in advance