Carrying out research is not a bed of roses. I am currently rounding off my bachelor's degree, so I am speaking from experience. The rigor of research work is always frustrating, especially when you are optimistic and things go south in the end. In a country like mine where resources are not enough, it is even more difficult.

Each stage is always present its own challenge. When you solve one at a stage you feel like a Victor, until you meet the next. Taking some time off often works but then there is the time constraint. I guess the solution then is never to relent and in the it will be all alright.

Good luck with your thesis @suesa and sorry about the mouse bite.