Hi sarsar,
How are you doing now?
I have a long history of diabulimia and have managed to not omit in 3 years.
Initial weight gain is normal, a lot of it is water weight as your body is trying to rebalance.
If you continue with eating regular heaalthough meals and normalising your blood glucose, the weight will most likely reduce and the excess water weight and bloating will go.
Your body will take some time to recover from what it's been though, as your mind will also take time to adjust to what has been a very stressful time for you.
Be kind to yourself, you are worth it.