Amusement park and about 4 weeks pregnant

Sarah • ❤️👶🏽
My gf and I just conceived and believe we are about 4 weeks and some days in. This came very unexpexpected but we are taking the bull by the horns. Although we had a trip to go to kings island tomorrow. We already purchased the tickets and I'm just curious if this would effect the baby at all. We really wouldn't like to cancel and don't plan on it because she really wants to go especially with this being one if the last times she can enjoy herself for a while at least. I'm just scared that it may effect the child's development