1 week post race hamstring cramping???

I did a very hilly marathon 1 week ago. I cramped horribly during the race mostly due to what I assume is lack of preparation for such a crazy course. My cramps during the race were everywhere in my legs.

1 week later I am still having cramping issues in my hamstrings. I was cleaning my garage and stepped over something and when my back leg came over it I cramped big time. Then a different time I was walking in my kitchen and stepped on something that stuck to my foot when I brought my heel up I cramped. There have been several other incidents but those two were pretty serious.

I have been stretching lightly but any flexing of the hamstring results in major cramping. This is not at all my usual situation. In fact I have only had cramps a few other times (Races) with no lingering problem otherwise.

Any Ideas why this is happening? Is this just a result or recovery from a battering a week ago or have I done something that I need to fix or worry about? Maybe this is no big deal but I would like to begin training for my next event soon and I would like to know that I have this behind me.

Thanks for the help.