Itchy red bumps on random parts of body?

For the past 4 days been having these random red bumps that itch anywhere on my body. I know it is not bed bugs(checked had a bug man come). Wash sheets weekly. Eat right work out half hour a day. Could it be a possible food allergy? The itches are so bad they wake me up at night, and it only happen when I am in my bed and wake up.