Hi Mark,
It seems a long time for it to be sore but it possibly depends on how you treated it earlier on. The cut in the middle of the stomach gave me more trouble than the other ones.
If you went back to work and strained it early on and then kept straining it then it will struggle to heal. It goes right through so isn't a small cut.
Basically I'd recommend keeping within the area where it doesn't hurt and slowly building it up.
As for the fatigue I don't know why that should be unless it's that you body is trying to heal but is struggling because you're doing too much.
If you were retired I'd suggest taking a rest but if you need to go to work then all I can suggest is you try not to strain it.
Perhaps a visit to the GP or asking at the hospital will give you guidance.
Also your name is public on here so you might want to use a nickname.
Regards Peter