Hello all I've been on Duloxetine for about 2 months and it feels like its stopped working, is that possible after such a short time?

I've felt pretty rough for the last few weeks actually, but lately (a few days) I feel myself getting lower and lower everyday. I'm back to thinking about suicide or hurting myself. I had a dr's appointment Monday just gone, and all he did was repeat my prescription and told me there is no higher dose than 60mgs for depression. So this is it? It stops working then I come off, then I try something else? I'm confused and fed up with all this, so if anyone can help me I'd be really grateful. Thank you.

Lynn.