I was gardening last night, putting some bark in my borders wearing shorts and top and I felt a sharp sting on my inner thigh. I looked and there was a small red mark like a blood blister, quite itchy. There's one on my shin too. I've had a shower tonight and am shocked at how red and infected it seems (the one on my thigh) - there's a red centre and then more redness spreading out and it seems a bit swollen. Wondering if it's an insect bite or maybe a wasp sting and what I can do to treat it. It's quite itchy. Any advice? TIA.