help chronic migraines lightheadedness

I am a 23 yr old male. I suffer from chronic migraines and/or cluster headaches.  I am currently seeing multiple doctors but they cannot find out what is wrong with me. I have an appointment with a neurologist but it's still down the road. i have been waiting nearly 7 months tho. the pain is nearly constant. i have had this for about a year now. i have a high tolerance to drugs so no pain meds work and I often don't sleep so i suffer throughout the night. When i do sleep i wake up i feeling awful often coughing up a lung. sometimes to the point where i vomit. they have done a MRI but nothing. lately i have been getting very lightheaded. kinda floaty, Previously when i was walking home one night i was hospitalized when i passed out in a parking lot and smacked my head. i am distraught with the idea it might happen again. my nose is a constant annoyance. it runs often even when i am not sick.  i do have a head trauma from my youth where i cracked my head open. but they assured me it was not the issue. if anyone could help me at all it would be very appreciated. oh i also have neck and back pain which could sometimes be described as nerve or spine pain?? if that makes any sense. i'd like to post more but that's all i can think of at the moment

[Dr Santos]

Hi,
How are you? It is good that the MRI was fine.  Prolonged colds are often associated with allergic reactions. And passing out or loss of consciousness can be caused by a variety of conditions such as low blood sugar, postural hypotension, vertigo, anemia, ear and eye issues. Both abortive and  preventive medications may help provide relief. Take care and do keep us posted.