Woke up with this on my thigh! It's about 3 cm diameter, so quite large :o And also itchy, sore and slightly swollen. I have not seen any bugs. I do have some fleas in the house unfortunately, from slacking with flea treatment on my cat. But those bites look totally different.
I'm freaking out a bit. No idea if it's relevant, but most of the morning I had difficulty catching my breath properly - yawning non stop to get more air in. Was feeling woozy too. I do feel better now (after 5 hours of it) That might have just been anxiety which I do have though, and it hadn't occurred to me it might be linked.
Now I'm freaking out though!