What The Hell Have I Done To Lose Page Views

I'm angry with myself because I have screwed up and my page views went south and very quickly I might add! I had been feeling pretty good with myself and could see that my blog was gaining some momentum. I had made a few bucks and my traffic was climbing and then, BOOM! I switched themes on BeltwayBoy Sports because the one I was using was outdated and ugly. My page views were over 47,000 for the month of May and as of now it is around 20,000. The theme looks ok, but I'm not quite sure where the problem is and it's driving me CRAZY! When I get this thing figured out I will come and post it on here.