Feeling really discouraged!

[LYONExotics]

As someone with a super cinny, pastel poss sandblast who is being shy, I feel that pain.
I'd step back and take a few deep breaths though.

My first breeding attempt last year had my girl eating well up until the month she layed. I had been pairing her up since Dec and she layed in May. I only saw 2 locks in that time.
Dinoroar gave you a good list of tricks. I'll add on that misting down the enclosure really well to simulate that storminess could help.
I've heard of some people putting 2 males together briefly to help get them a bit amped up. Not long enough for them to start fighting, but to at least get a good whiff of each other. I don't know how effective that is and would worry about being unnecessary stress.

But on the topic of stress...
You mention the female being paired with him since 10/26...if by this, you mean co-habbing, I would definitely stop that.
Sure you hear people talk about pairing a male to "All of their females" But the reality of it is that male will need time to recuperate and de-stress. At the very least try a 2 weeks on, one week off. Don't just keep throwing him in weekend after weekend. Maybe after the weekend off, a good misting and the help of another male's spermplug for jealousy might be all you need.

Thanks so much for the advice! They aren't co-habbing, I've put him in with her once a month for 3 days each time...so not crazy often. Definitely will add the misting to my list of tricks to try