Slightly Nauseas

So, after I got home from a work training, I was really tired. Normally, I would do some paperwork and try and get ahead of myself, but not today. I got on the couch and read some of a pregnancy book (Pregnancy Week by Week) and then took a nap. Jerry got home right as I was falling asleep, so I decided to take the nap in the bed instead. I slept like 30 min and then got up for a few to feel slightly nauseas. I knew Jerry must be getting hungry so I went ahead and made tacos for dinner. After cooking, I felt a little better and decided to go ahead and eat. I had dinner and now I feel fine. I have this burst of energy every night at about 8:00pm....Not sure what that is all about!