Hi, don't worry. Your just normal. I build and sometimes I go in spurts. Work like a fool 8,10,12 hours a day. Then Bam!!! I just walk away for what ever amount of time. I built a 33% Waco a couple of years back...over 1700 parts in all. It took about 6 months to complete. Then a Balsa USA Stearman was next..almost the same amount of parts.........about a year on that one.
I find if you run into a problem while building it is best to just walk away for however long it takes to feel better about the problem. And then you usually find a cure for that issue and back on track. If you (I) try to push a project along it will always result in you ( me) making mistakes that I have to re-do or re-build the part. o the end result is about the same in time to complete.
Just take it easy...this is a hobby....... no one enjoys your build more than you so do it at your pace..and enjoy!!!!