How long will it take for me to gain back the weight I lost?

melissa2
I was hospitalized with withdrawal symptoms about a month ago, and didn't eat or drink for nearly two weeks. I was 109 pounds (5"2) before and wound up losing four pounds. I got better, starting eating normal again, and then got the flu on Friday and I ate my first meal since then today.
I HATE losing weight- I'm like 102 pounds now I think and my jeans are getting less snug. I have a ffast metabolism but I don't like being skinny.
Anyway how long do you think it will take?
I heard tthat if you go awhile without eating you gain weight quickly when you start eating again.
Also I'm taking a corticosteroid for my illness for the next six days, does that cause weight gain?
How long will it take for me to gain back the weight I lost?
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