Very Frustrated!

Well I've seen lots of action in the last 14 hours, but nothing is progressing. Last night at our birth class I stood outside and walked for an hour and a half and had contractions every 5-6 min with good intensity. By the time we got home at 9:00 and was finishing packing, things slacked off and by 10:00 no more contractions.
Then throughout the night I was awakened by very hard contractions. By 3:00 I was sick of waking up in pain and felt I could handle it better if I was awake and prepared when a contraction started. They were every 10 min for several hours. At 5:30 they had tapered off again and I was exhausted. I sort of went back to sleep and got up around 7:00. Jonathan and I went on a long walk, which created a TON of pressure and lots of lower abdominal cramping. Some contractions, but still nothing consistent!
So basically what I have learned is that regardless of how much you prepare and learn and seek advice, your situation is never normal. What I am having is so far from text book and all that I was expecting. I have no idea if I am actually in labor or not.
I have an appointment today at 1:40 so I guess we'll see what they say. Please keep us in your prayers. This is beyond frustrating and somewhat concerning. I am trying hard to stay positive and focused, but it is difficult when you have no idea what is going on inside your body.
I'll update again after the appointment.