My sympathies! Your sleeping pattern is a lot like mine often is.

I take Wellbutrin myself, actually, and I found that when I was taking it in the mornings it gave me afternoon headaches, so I tried taking it at night even though it's supposed to have the effect of waking one up/keeping one awake, and for me it hasn't had any adverse impact on my usual insomnia. Go figure. So if trying to take it at a specific a.m. time is stressing you out and making the sleeping thing even more complicated, maybe it'd be worth it to try moving that window around?