Did my calf have a heart attack? (long)

I don't keep my logs here so I will provide some back ground:

I have been upping my run miles over the past 6 months. In April I was around 12MPW and I am now around 20-22 MPW. At no time did I make "huge" jumps in MPW. So I think my progression has been subtle enough. In May I went minimalist with respect to my running shoes to see if it would rectify some knee issues. Not all the way to vibrams but with a shoe that only has 3MM of drop and they are pretty much a shoe body on a piece of rubber. Initially I went in to them pretty easy with 10-30 min runs at a Z1 pace. I did that for a few weeks and then started adding miles and intensity. For the first few weeks I had tight calves from transitioning to a mid foot strike but that cleared up. All was well and I continued to train and for the first time pain free running!!!

Fast forward to 3 weeks ago where I had a pretty heavy training week with a lot of bike workouts that thrashed my legs and a long run (8 miles) or high intensity track workouts. My coach was working me pretty hard building for an Oly and by the end of the first week both calves were tighter than they had ever been. I upped my foam roller and stick sessions, I also started using a golf ball to get in deep on the sore spots. Things got a little better but a second week of build training left my legs pretty wrecked again. My long run for the week was going to be 10 miles but I only managed 5.5 before my right calf cramped up so badly it put an end to the run. At that point my calves felt like someone took a hammer to them but the right one was in the worst shape. My coach and I agreed to go with a really light recovery week and I left it at that.

I pretty much shut down the next week to let things heal up for an Olympic race this past weekend. I did zero running and on race day my calves were pain free and loose. I will admit I ate the paste on the bike and went harder than I should have so that could contribute that what came next. I got off the bike and out of T2 fine and as a matter of fact I was on a good pace that was about 30 seconds faster than usual and my HR was in Z2 bordering Z3 which was awesome!!! There wasn't even a hint of pain in either calf. About .5 miles in to the run my right calf just seized up! My left was fine but the right was staging a major coupe de tete. I was literally limping and eyes were watering from the pain. I managed to stretch it a little and get going again. However, it would get really tight again and I would have to walk until the pain subsided enough for me to run. That 10k was the most brutal as I had ever run and it was a slog/stretch/jog to get it done.

Sunday was an exercise in pain. The right calf would barely take any weight not to mention the foam roller and stick had me uttering expletives like a sailor. I discussed it with my coach and she seems to think some aggressive RICE and ART to get things loose and re-evaluate Tuesday is the best course.

If it is in fact a calf heart attack can it be diagnosed? Is it just my body adjusting to the newer load and I need to stop being a over a severe cramp? Anyone else had these types of calf issues after heavy weeks and was successful treating it?

I will see my DR but I was just wondering if there is something else I can do to work through this tight calf stuff without ending up like I did Saturday? I usually don't stretch post workout but I do long cool downs and use the roller and stick. Until a few weeks ago that seemed to do just fine. I used to stretch but it always seemed I injured myself more stretching than I did not stretching.

Sorry for the long post.