You know, avoid all people trying to make you feel bad about the workout slump. It happens to us all and I am right there with you.
I have not worked out for 2 or 3 months because I have been plagued with depression, constant headaches that last 2 weeks at a time, viruses, and migraines. I have never sustained so much consistent sickness in my life. I think it all stems from the depression and suppressed immune system, but whatever. I do not feel guilty about it. And there is not a whole lot of "regret" either, although according to one poster here, I should apparently be swamped with it. No, not at all. And I think it is incredibly unhelpful for anyone to suggest such a thing. So, please ignore all suggestions regarding regret.
Workout slumps do not last forever, and this one will pass too. I agree with the poster who suggested that yours has probably happened for a reason. I know mine has. Analyse those reasons if you like, or not. I am not sure that such analysis is helpful. The slump is the slump and that's about all you can say about it!
The fact that you have come on here to post about your current slump suggests you are reaching the point of starting to think about doing something about it. Take your time. You could start back tomorrow, or next week, or the week after that. No sweat. The end result, for when you do get back into it, will be the same so when you decide to jump back in, or ease your way back in, it doesn't really matter if it's sooner or later. When you are ready. When you reach the point where you are sick of yourself, sick of the inactivity and think you might go mad if you don't break a sweat soon, then you are ready.
When you do decide it's maybe time to put a toe back in the water, ignore all rotations/fitness plans/and bust-a-gut super advanced workouts. Instead, pick a few workouts that truly bring you joy and just do those few for a while and see how you feel. Once you start moving again, it just feels so bloody good to move, you should revel in that exact feeling: moving. So, it doesn't matter whether it's step, kickbox, treadmill, weights, or freestyle dancing around your living room, just move and enjoy being in your body.
Wishing you a happy end of slump, whenever you feel ready. I might go to the gym tomorrow with my fave tunes and maybe do some powerwalking at much slower paces than I normally do, just to see if I can do a workout without triggering a headache. How about you? Thinking of you and wishing you well,
Clare