I need some reassurance?!?!?!?!!

I have been invited to go to Six Flags in May. I am deeply afraid I'm not going to fit on the rides. I am currently 244, but by then I figure I'll be at least 230. Can anyone reassure me that I will fit and not be totally Mortified? I am wearing a size 20 jeans and 18/20 tops. I know you all probably think im silly, but I don't know if I can handle not fitting. Thanks Everyone. Elizabeth