Runners, take your stretch marks

Last night I found something that I had been waiting for- over 5 months nary a blemish on the belly, and BAM! My first stretch mark reared its ugly head. Actually, the mark is not hideous. In fact, it's in the shape of a lightning bolt- a purple lightning bolt. I've become a guttural Harry Potter- with a regal-shaded "dark mark." Hope this isn't TMI (too much information), but I need to vent about the pain of a westwardly expanding belly. I feel my skin ripping at the seams; I fear that I might become unravelled with a hard sneeze. And who will clean me up if I split? My dogs? This phase of pregnancy is painful. Forget boob-engorgement, tummy tension is the pits.