feeling self-conscious about my arms

Ok ladies...I need a pep talk please. I'm overweight and normally don't wear sleeveless shirts. The wedding gown I fell in love with is sleeveless and all I can think about is what people will think when I'm standing at the altar for 20 minutes. I know better than to even give a second thought to what others think. Maybe its the stress of wedding planning but with 39 days to go, I' m really uneasy about it. Anyone else going through this?