I was on a low dose of Effexor for almost 20 years to minimize hot flashes. Even though I was not on this medication for mental health reasons, I developed anxiety, akathisia, circular thoughts, fear, irritability and insomnia when I came off the drug and have been working to get past those for almost two years.
The other commenters here have made some good suggestions re upping your dosage, other meds, other treatments, etc. I'm getting the impression that you think you're just spinning your wheels and taking up space, but you said you're going to look into those suggestions and you've tried some already–I applaud you; you ARE trying to help yourself AND not just sitting on a log.
My suggestions are really just baby steps–
I find it very helpful to get natural light into my eyes–not sunbathing, but getting out and seeing daylight. I don't necessarily take a walk, but I, at least, get out on the front patio for 5–10 minutes, or leave the office at lunchtime.
Do you garden at all? There is quite a benefit from getting your hands in dirt. Really! There's a microbiome in it that may double as a natural anti-depressant. Even if you aren't up to a lot of gardening (or that interested), a houseplant, or two can lift your spirits and give you something beautiful to look at and/or smell. I am having fun with amaryllis bulbs right now–I have a few in my kitchen and a couple at work.
I am mindful of what I watch (no frenetic, violent, or disturbing TV, or movies), read (cozy mysteries, or romances are okay), or listen to (no atonal, or dissonant music)–some things are just too agitating.