Clomid takers

Ok so my gynecologist put me on Clomid for the first time this month. I was suppose to start on day 3 on my cycle but the pharmacy was our, so I started it on day 4. Then I was suppose yup take it for 5 days but only got three, so took those and have been extremely horny so been having sex for almost the whole week. This morning I woke up extremely nausea and still horny. My question is, is it to early to fill this way? Or does Clomid make you feel that way? Or could I possibly be pregnant?