Is it normal to diagnose migraine just like this?
I went to ER to ask about my severe new headache. I just wanted to ask nothing else was available at the time but they became very concerned with me wanted to check me in to the waiting room so I was sitting there severe headache for a day and a half with painkillers not working and a nurse came and took blood from me and some pulse and stuff then an hour later he came and he said everything looks normal. So I decide I can leave now because I was very anxious I did not want to be there and my tests were fine but they stopped me in the reception and said I have bad symptoms and maybe dr wants to order me for an MRI so I should not leave and I was like oh and went back to the waiting room. I had to wait 6 hours. Eventually just sitting with tears rolling down from both anxiety and pain and I pushed the button the nurse gave me multiple times in a row until he came and then I went "im seriusly leaving now I will not sit here any longer" and he was very concerned then he said I am allowed if I want to but he very strongly advises against it so I stayed and then dr came like 40 min later and he asked me many questions and one was if ive had vision changes like zig zag lines so I told him before ive had such vision disturbances followed by headache so he said "thats migraine" and then he made me do random stuff like smile and frown and make arm movement with my eyes closed and stuff ??? and then he said I suffer from migraine and he will prescribe me pills for this.
I am very wondering if its possible to diagnose migraine like that ? they did not make every test possible first. Blood sample dont show all inflammations and stuff. So how can he ?