When u have sex for the first time do u experience any sickness like dissyness upset fatigue light headed act and how long do it last please?

Those symptoms are more related with anxiety, which is frequent in those situations.Another possibility is that you are not used to physical exercise and you were using all your muscles and requiring a lot of oxygen that made you feel temporarily tired and lightheaded. Or,If you had not eaten in a while or were not well hydrated, you need to. All of those should go away in less than 15 min.of rest