Drtgirl, I think that given your situation (DH has stable, good paying job), you should follow your gut. So many folks are unable to do that due to financial considerations, but if you can, then do it. It's not worth being depressed and anxious and miserable every day. Sounds like your new position is a horrible fit (and shame on your boss for putting you in a position you really weren't qualified for!) I would be outta there just as fast as I could find something else!

Best of luck and please keep us posted. BTW, this advice is coming from an almost 50 year old who wished she'd changed professions or at least industries at your age. It's all too easy to get stuck in a rut (especially when you're well paid) and stay in a field for decades that you were really never too excited about to begin with. Believe me, I've been there.