What the heck has bit me?!

[Dramaramalama]

Was at work yesterday and suddenly felt really itchy, suspected something had bitten me but thought nothing of it. Later that night itchy I felt itchy all over started so thought maybe hives. This morning I noticed 3 bites on my leg which are still so itchy and the large one is getting bigger. I feel fine in myself apart from the itching. Will they eventually just go? Is there a cream to take away the itch?
I work in an office so don't know what would have bitten me, especially through tights. I was in the garden the day before doing weeding but no itching or bites then?
Just writing this is making me itch!!!

I was bitten in 4 places on Friday! Two sites are like yours but the other two are close together and have merged into a massive red, itchy, hot rash.

The rash spread up to my armpit and down to my elbow...awful. I got it checked out but they were happy that it was pinky red and and not pillarbox red. It's beginning to recede today so fingers crossed it's on the mend.

I've had reactions to horsefly bites like this before so I'm assuming it's one of those blighters.

Ice is very good too for bringing down the dwelling and itch.