Thanks windapp. Unfortunately, going under water in a pool isn't enough for me. I love the water and am totally comfortable in it. I swim a lot. I have dove into pools, etc. with no problems. It was only when I took the mask off while breathing with the regulator. I suspect my brain told my nose to breathe in. But, that's why I felt more comfortable talking to my instructor and scheduling some one-on-one time with her the week before my trip so I can do the tough stuff over and over to a point where I feel comfortable with it and not so panicky. We are going to buy a regulator for me too so that I can be assured I have one that allows me to breathe easy - otherwise, that is sure to cause panic for me if I have any issues feeling like I cannot draw a good breath.