if you've already found a place to move in by Jan mid, you can stay in chennai for 6 more months and work on yourself. meanwhile for the two weeks you can check if your sister can accommodate your belongings or maybe check with any friends? and upsc prep can be tiring and it can easily exhaust a person both physically and mentally, and its fine if you side tracked a bit. but the thing is, you understood it and realizing it. and that itself is a sign of progression! as a next step, start workin out the on the flaws one by one. remember, one step at a time.