I am not sure but perhaps your epilepsy may be affecting your chances of having a baby. It's worth asking your doctor.
As far as if you are pregnant now, take a pregnancy test when your period is late. You should have an accurate result. Those all sound like normal pregnancy symptoms, if you were to be pregnant right now.
When you take a pregnancy test and it is positive, call your doctor to ask about the medications you are taking and whether you should continue or stop taking them.