Sensation did come back, not to the full extent of before, and the early warning system is not what it was. But it came back and it is usually fine with a thin Tena liner as back up.
Might be worth asking about a referral to a woman's health physio now in case there is a waiting list. Or looking for a good local private one if you can afford that. My early tests were done with electronic kit inserted into the vagina so I didn't need to have sensation to get some assessments done.
The physio could also advise on exercise you can do now, or what to avoid, if that would make you feel you're doing something.
I do recall the grief of the old life feeling lost. I was 33. It's all part of the mad identity shift to being a parent for the first time as well, lose old self, feel broken, add extra responsibility of another human.
Get support where you can, but also try and work out what you need today and stay in the present moment as much as possible. It's so easy to think it's like this forever. It will change and improve a lot. Work out how to do today, put in place appointments where you can, see the GP perhaps to let them know what's happening for future reference, and then find something you can do today that you enjoy. Book. Film. Food. Bath. Any tiny thing that is you looking after you. Repeat daily.