Clusters of blisters after bites

I recently woke up with what looked like 4 or 5 bug bites in a cluster on my stomach. They are not itchy but red and the area surrounding it is red. Now, 2 days later, it has morphed into a cluster of about 10 or 11 little clear-appearing blisters, again, not itchy but red and tender when my clothes rub on them. I've never had bed bug issues before and haven't made any changes to our blankets, pillows etc. Any ideas? I've heard that Brown Recluse (we live in Oregon) bites can turn into a cluster of blisters but that it's normally itchy.