biting bugs

Why do mosquito bites always itch worse at night? and why do they like my right side better than my left? It is a mystery. I have at least 55--I counted. They're not all mosquito bites; some are from no-see-ums, and others from ants. luckily, the ant bites don't itch, they just sting for about 5 minutes after you get them. yesterday I managed to get ants in my pants by stepping in a swarm of them--ouch. I am grateful to have strong bug repellent and a mosquito net on my bed--I would be absolutely miserable without them!