I was sleeved on 10/6. And last week when I weighed myself I was 212... then my period started on this past Monday 10/31. And I weighed myself today and I'm 215. Is this normal? Or have a screwed up somewhere?

Very normal. You can fluctuate a good amount from your period. Keep on plan - push more fluids and it'll drop again.

thats a relief to hear. Is it also normal for me to be more sore in my abdomen?

Probably. Maybe not period related but heard others talking about their stomachs were sore at 4 weeks.

I gain 5 pounds the week before. It all comes off two days after ye period begins.

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For me, it's a water retention issue. A few days before my period starts, my rings become tight on my fingers and I feel bloated. A few days after and my rings will slide over my joints easily.