Went to the er for the first time idk what to do next

Last night I was having the worst migraine I’ve ever had and my mom had me go to the er where they gave me some medication and told me that I should see my primary care to talk about what to do next in the future etc so like a good patient I made an appointment with my primary care but I have no idea what I’m supposed to say or expect from them! So if you guys could shed some light that’d be much appreciated!