I never had a lot of symptoms early on with my pregnancies but did have headaches as time went on. Clomid is adding to your hormones and it may result in headaches for you and breast pain is a notorious symptom of hormone changes. This happens even as a PMS symptom with that fluctuation in hormones. I know it is hard to wait but the test will let you know the situation. Symptoms aren't a great way to tell so early on. So, wishing you big luck an a positive test!! Come back and tell us how it goes!
My nipples was sore but breast pains no good luck :)