I had a traumatic first birth too ❤️
It's normal to have certain expectations and hopes about how birth will go, and when that doesn't happen, especially when that is paired with a lasting impact on physical and mental health, it can be very difficult to come to terms with.
Many people I know don't really understand why I still haven't 'got over it' by now, so I know it can be hard to let those feelings out. Have you spoken to a counsellor about your feelings? It could be possible you have PTSD or birth trauma.
A book I've found to be really helpful is More Than A Healthy Baby by Dr Erin Rowe.
There's also Healing Your Birth Story by Maureen Campion.
As for your pelvic floor issues, there are people/things that can help with that. Start by getting an appointment with a pelvic floor therapist, or even just your local GP who can refer you. They can tell you what your options are.
Have you been checked internally for injuries since the birth? Did your medical team say your stitches have healed ok etc?
I understand you may have had an episiotomy due to the use of forceps - if any scar tissue from that is causing you trouble then you might be suitable for a Fenton's procedure, where they remove scar tissue (they give you local anaesthetic). You can also try applying vitamin E oil on the scar (internally and externally is fine).
Wishing you the best ❤️