The past few days i have gotten a large amount of bug bites? I'm talking like 20-30ish here, i see they are gnats when they bite me and fly around. It's not even that there is a large number, when one bites me it bites several times in that area. And the thing is, I'm the only one being bitten in the house. I sit in the same room as others but it's only me. I haven't been bitten once in the past few weeks but the last 3 days Iv been attacked. What causes this?