Rollercoaster harmful in this time?

Yvette • TTC since the start of August `14.
Hey girls! So here's the deal: I'm 3 days late and we have a themepark visit planned for next friday. I will be (hopefully) 5 days late that day.
​Is it wise to stay of the rollercoasters in this situation..? Or is it harmless? I'm worried that it will ruin a possible pregnancy... 
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