My Garden-Blossom End Rot?

I have been noticing on my peppers (bell peppers too) that some of them have these brown spots and at first I thought that a bug was attacking them, but the problem was very inconsistent. So last night I finally did some research and took these photos. Some people say they think they have sunburn then others say blossom end rot. My only problem is that the brown parts are not on the end, they are sometimes on the middle top, etc. These plants are in a raised bed and due to the weather (41 days of triple digit weather) I have been watering almost every day. In the research I have had people have cut out the brown spots and ate the rest of the plant. My question is, what should I do to stop it, are these still edible? I bought shade cloth and can put that on stakes over the plant if sun is the problem (as I have direct sunlight all day (no trees to shade the plants), if it is a fungus of some sort, what can I buy to stop it? I mulched earlier this year, but it has since flattened out, should I mulch again (I used alfalfa mulch that I got a feed store)? Any information that you may have will be greatly appreciated. Sorry for the quality of the photos.