Sounds like a case of SeaCraft Burn Out to me. It can happen to the best of us usually a few 6 packs, some time to recover, and a brake from the project is in order R & R can work wonders.
When I did my boat it took approx 150 days of work before I splashed her. Somewhere approx 2/3 of the way through I started getting some of the symptoms. I know others here have also been smitten for periods in time as well Beer and R & R usually works.
I reminded myself that it takes twice the time I thought it would to finish the job and geared down to adjust to the stress.
You will make it through good luck Brian
FellowShip
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Just for the Grins
Official 23 SF Antique Classic SeaCraft Owner