I have taken this twice, both times I came off it for side effects. The first time wasn't too bad, I was just hot and my blood pressure was going up.
The second time was awful. I felt like I had flu - hot and cold chills, nausea, dizziness, could barely get up from the sofa. And I had terrible shaking. This all went on for 6 weeks until I decided enough was enough. I am on a lot of other meds though, including pregabalin and opiates - the doctors think it was an interaction with the opiates.
When you say you can't tolerate SSRIs, what are your side effects? I actually developed the shaking on Prozac, had 6 months off, then tried the duloxetine because I wasn't doing well on nothing. Afterwards I found out that I shouldn't really have tried it as the likelihood of the shaking returning was pretty high.
I have chronic pain too, it worked really well for the pain 
I am only allowed Valdoxan now, no other ADs - it's moderately successful for depression and slightly less so for anxiety... does nothing for the pain.
Can I be cheeky and hijack your thread to ask @lyrebird1 how you get on with the lidocaine infusions? I have just been offered these but have read some slightly scary stories online. Glad they have helped you but did you get any side effects? Do you know how much you have and how often do you have them? Thank you 