Freaking out a little

So, as I've mentioned before next week (Sunday to be exact) I'll be leaving for the first ever youth ministry mission trip of our parish (I am the coordinator of Youth Ministry). In the beginning I really didn't want to go on this trip because I was worried about the "what if's". Like what if I'm pregnant! BUT I did think it was pretty cool that the kids actually WANTED to do this and my pastor really encouraged me to make this happen. He said it would be really good for our program. We only have five kids going which at first made me happy (not so many kids to worry about) but is now causing me a bit of worry because the five don't really get a long and it IS a lot of work just for 5. I think with a bigger group there are more chances for kids to connect with each other, more personalities. I am also not looking forward to doing manual labor. Don't get me wrong I think flood relief is very important BUT I would rather do the type of service were you interact with people or work with children. But mainly I am freaking out because, what if I AM pregnant????? I'm not stressed out right not but inevitably something is going to happen to stress me out and that is not good for a baby. How delicate are you in the first few weeks? If I am pregnant...even just barely I don't want to do anything to hurt that. I don't know why but I really think (hope) that this is it that we finally did it this cycle. I want to be one of those people who says, "Yep! We got pregnant on our 12th cycle!" I'm trying not to think about it too much but it's hard not to! I'll be 10DPO on the Sunday we leave. I can't decided if I should POAS that morning. I guess I'm saying if I am pregnant I don't want the extra worry but it sounds like even if I don't POAS I'll still be worrying. What would you do?