Its strange that you feel sick. Do you also get this when you work out on other moments of the day?
As for food after your workouts. A protein shake with some carbs next to it is great. These shakes are surely not just for bodybuilding types. They are an easy way of comsuming protein for everyone. At the same time they are an light meal which is good when you want to sleep short after.
Could be you should eat a lil more during the day. Or take a lil more rest before working out in the evening.