May I have a brain tumor or something?

Hi, I am 27 yrs old & have been a migraine suffer since I was 9. Over the past year they have become more prevalent, more painful and a lot more often...it seems as though I have had a severe headache for over a year! Recently in the past 6 months, the headaches have been mainly on the left side of my head, as well as unknown nausea/vomiting (not pregnant) numbness/tingling in my left arm/hand and no medication has worked...tried everything given to me by a doctor from my usual migraine meds to narcotic shots to allergy meds! I have also not been the most "stable" person when it comes to my mood, as in I will start crying over nothing or becoming very angry out of no where; I have blamed it on hormones! I have also been very flakey and forget an important date or something I had said earlier in the day. I am a smart, full-time student at San Diego State and I have found myself having difficulty studying, concentrating and being motivated to go, mainly due to the fact that I don't feel well with either a headache or nausea! I saw my doctor & found out that I do have a sinus infection and have been referred to an ENT...but I forgot to tell him my other symptoms that have been prevalent the past several months as I thought nothing of it! The reason I have some concern as my best friend's mother had the EXACT same symptoms as I have had over the past year and yesterday she found out that she has a brain tumor...they are waiting on results to see if it metastatic. So. it made me think and maybe thinking way into it, but I was wondering if there is anyone that has thoughts on this, like a doctor or someone who has recovered or is going through the same thing. I have an appointment this coming week, April6th to be exact but just with my primary doctor as I called for an "emergency" appt this morning! I may just be over reacting but in my gut I feel as though my headaches and symptoms are more than just migraines or allergies BUT I am not saying I think I have a tumor...it just could be a possibility and I will continue to pray that it is not and it be something simple, like I have a chemical imbalance or something! Anyway, I would appreciate any advice or thoughts, except "go see a doctor" as I already know to do that and I am. Thank you!