Rollercoasters during 2ww?

Sa
So, hubby and I have planned a 3-day trip to a theme park. Annoyingly I'll be on my 2ww then. Do any of you know if it's safe to go on rollercoasters, or could this somehow, I don't know, 'dislodge' the fertilised egg, if present? Would you go, knowing you MIGHT not be pregnant anyway, but also don't want to harm your chances? HELP!