Loss of joy was a bit of an issue for me - and then lack of motivation to find the joy.
Getting out in fresh air helped me. It wasn't magic, but just taking 10 minutes at first to go for a walk each working day meant I was away from my desk and could give my brain a pause. I didn't make myself do anything or feel or think anything. And I told myself that really, people go for a long toilet break or coffee break at work that takes longer than that walk.
Then I made a playlist on Spotify of the songs that made me happy. I listened to it when I was on the walk, or making a cup or tea. A tiny bit of joy that sometimes I just listened to for a couple of songs.
Making sure I get dressed every morning and make the bed (well, put the duvet and pillows in place) as a message to myself that I am Doing Something and not Avoiding Everything.
Otherwise, HRT has helped me find myself again. I didn't get a blood test, the GP listened to my list of symptoms.
Exercise - I do 20 minutes each day at 7am. I don't give myself a choice to debate if I do it or not, consistency is better than relying on motivation to want to do this.
But life is hectic. It's the busy point, getting kids to school, keep the house from being a midden, work and trying to fit everything in. It is hard and tiring. But tiny moments of joy can help break up the tedium and hard grind.
It is worth speaking to your doctor again though, maybe your anti depressant level needs increased or altered, maybe you are low on vitB or iron, maybe HRT could help. But the key is you don't need to try and solve that on your own.