What would you do?

My husband and I got married a little over a month ago and had planned on going on a mini "honeymoon" this weekend to white water raft in WV. We booked our trip and had everything all planned and ready to go! But...a few days ago, we discovered that I am 4 weeks pregnant! I have done some research about rafting and we are going with a group and a guide will be on the raft with us so it is very safe. I don't think that it would put our peanut in any kind of danger, especially this early in my pregnancy. We are still planning on going, but I can't help but feel skeptical. What would you do?