Sudden weight gain OMG

Elphaba • Ftm little girl on the way

So last week I stepped on the scale I was at 129 lbs... this week 139 lbs??? What happened? Throughout the previous weeks I was gaining maybe 1-2 lbs/ week, why the sudden weight gain in week 37? I haven't been eating more than normal, the only thing I've changed is eating ice chips throughout the day cause the cold keeps me awake.

Is this weight gain normal?