Feeling disappointed and misunderstood

I have no one to talk to about these things, so sorry for the vent. But right now I just can't keep this to myself with how horrible I feel.

For as long as I can remember, I have started getting migraines since 13yo when I started wearing prescription glasses. My biological dad told me they were hereditary, so I thought nothing of them. Since last year or so, I've noticed I get migraines at least once a month. They can last several days. But even though they are horrible, the most I really do is sleep the pain away, since I don't take any meds for it. Recently I've been wanting an answer, wanting to go to a doctor to see what's wrong with me. Because I guess I just feel like something's wrong with me.

Yesterday I had a migraine which was worsened by fatigue and lack of food. School nurse told me I had to get a checkup, so I did. I sat for four hours shivering from the AC just to be told nothing. And now my family keeps telling me to eat (which I think is a bit triggering to me because I have a history of ED) and sleep. Like I'm an idiot and I need to be told all these things I already know because they think I don't know how to take care of myself.

I feel extremely disappointed and misunderstood, too. I understand I should be happy with my checkup and that my family are reminding me all these things because they want to help me. But I just feel like no one's looking at it from my side. Especially since I have these migraines every month and have learned to put up with this pain over time. I feel like I wasted my time and money going to the checkup, just to be told everything I already know. It's like no one wants to listen to me, I guess.