I'll back track with the rest of the posts in a min.
Hopes, I'm with you, sounds like an allergic reaction. As you know, they are only serious when your airway becomes compromised, but this sounds manageable at home. Like the others said, itching is common in pregnancy and is a combination of the stretching of the skin, hormonal changes, and increased sensitivity. If you already have allergies, its likely they will be worse while you are pregnant. If it persists defo see doctor cause it sounds horrible
you had a lot of dairy stuff yesterday, how about laying off that for a bit and seeing what happens? Have you got some calamine lotion? Hope it clears up soon, it wont harm your baby. But while were on the subject I'm gonna warn peeps that some pregnancy itching isn't good for the baby. Its called Obstetric Cholestasis, and can affect women in the second and third trimester. This itching is the worst on the palms of hands, soles of feet and arms and legs. You will feel sick and tired, and may have some jaundice. So later on, get itching that hasn't got an obvious cause checked out by a doctor x
Babydream, your temps would be high after so little sleep. You can alter temps to accomodate shorter or longer sleeps, see how you do tomorrow when you get back, try for 4 hours. If you have this happen a few times I'll help you adjust them, but one slightly out shouldn't hurt x