I was forced off the Citalopram because of the new recipe having an allergen in it so I finished off the box and didn't take any more. There have been tough days since coming off it 'cos my body had been taking it since 2003 (I was on Amitriptyline before that) so it was kinda expecting to have the next dose, but when it didn't come my body got into a bit of a flap. The combination of 4 supplements and walking our pup every morning has kept me stable ever since though.
There are still occasional days when my motivation hits a low but I just down a litre of coconut milk and spray the intense B12 into my mouth and I'm good to go again within minutes.
I've been where you are now, Lost, and I know and understand how frustrating it is when all you hear is to go for a walk, especially from a fellow sufferer, but when you get into a routine and you have someone depending on that routine every day, if you can find the motivation for the first couple of weeks and you take yourself out to get a pint of milk or the morning paper or visit your library or whatever, you will start to notice an slight increase in your mood.
My body depends on the daily walks with the pup and the supplements every day instead of the Citalopram now and I just have to look into our pup's eyes when the motivation starts to throw a strop and I know that I have to do it for her. She's relying on me for her exercise every morning, in all weathers, and she can't open the front door to take herself, so I know that she's relying on me and I promise myself a bar of chocolate or whatever when we get back which I rarely need now 'cos I'm more motivated than she is some days! lol
Do yourself a favour and get your vitamin levels checked by your GP then come home and order a B12 spray from Amazon. When your motivation/feelings are low, squirt a couple of sprays under your tongue and it'll start working it's magic almost immediately.