Hi Linds,
I hope you did fine at your upgrade.
it would be worth to take some time off. It seems like you burned out. It happens to me too when I am over-worked. After you come back, try to enjoy life as much as possible. Do things you enjoy on a daily basis. The PhD is a long distance run, it is not a sprint. So, you need to stick to a productive routine you enjoy to keep going. For example, I go to the swimming pool every morning, I enjoy cooking healthy meals, inviting friends over etc... I also try to sleep well, and try not to worry too much.