GAINING weight!!!!

So I have been doing shorter fast recently and usually lose 1.5 lbs a day. After some time, I ended up having to eat for two days and gained three lbs, so I started another fast.
The start of the fast (Sun) I was 103.4
Next day 102.8. I was a little saddened by this small loss, but felt it was okay because I weighed earlier than normal and drank more water that day.
Next day 103.0....a little nervous once again, especially with the goal of being 96 by this Monday.
Today...103.4 WHAT THE HECK
Now I do have an impacted wisdom too and am on Antibiotics and a high dose of painkillers...but still...how the heck am I gaining. This makes no sense. I am freaking out. I am needing to get to 82 lbs by Aug 6 and at this rate I am going to be 120 lbs by then. I don't get what is going on. Should I expect maybe to drop a lot of weight overnight one day. Should I go to gym. This doesn't make sense Tweet