Cool-- I look forward to sharing information. If I remember correctly, you have odd abdominal pain like mine, too. And muscle/limb aching (I have that, too).
Like you, individual lesions last over a week, but I'll usually have at least one or two on my body at all times. They start off looking like angry mosquito bites, but as they heal, they get bigger, less raised, and paler.
As far as blood tests go, my most remarkable abnormal results have been low C3 and low C4.
I'll send you a nice, informative email about my whole experience later this evening after I get off work, so as not to bore everyone here.