You've got to find ways to reduce this blow out period. This is where you are going to find the challenge in your weight loss journey.
Here is something to think about; weight gains during weight loss cost lots more than we realise. By that I mean if you have gained 2.5kg, you have to expend 5kg worth of energy losing effort just to get the same number you were. This is what I call "slippage". I would have lost far more quickly if I had been more careful about slipping back. Re-losing what is already lost isn't very smart. Instead of having to re-lose 2.5kg you could have used that effort in losing another 2.5kg. In the second half of my journey I spent a lot of time keeping these slippages down. I would do anything to keep it to a zero rather than a gain (of course a loss was the best outcome). Going backwards saps your motivation, discourages you and makes you work harder and longer for the same results.
You've got some time before the next attack - make your plans now!
I'm sure you will win through...think smart and that healthy lifestyle and better future is yours!