Why am I having intense throbbing pain in the temple?

Hello doctor,

I am a sufferer of hemiplegic migraine. However, I had unusual collapses three months back. The first one was 40 minutes; I could not recall the whole of that period. I came back with an injured knee and felt dazed. I was fine after around two hours. The next day, I felt pressure in my head and as though I was about to die. I then could not recall getting home or the rest of the night. I was fine in the morning. Two days later, I felt horrendous pain in my head, felt like I was swimming, then tried to go home and again could not recall from deciding to go home to around two hours later and I was foggy for the rest of the night. I have had constant pain in the left side of my head above the temple for four years. It does not go. However, In the past two weeks, I have felt like it is throbbing and at times about to burst out. I was meant to see my neurologist three months back, but his receptionist did not follow the recommendation, and now I am unsure whether to have the tests done. I feel like we are playing with my life. Usually, I am pretty relaxed about the possibilities and know it is a migraine. But this feels different. This feels like intense throbbing above my ear from the temple along towards the back of my head, with a pain in my ear to just behind my jaw under my ear. My instinct says that an aneurysm needs ruling out. I do not know if I am just upset because it feels so different and this pressure is intense. It is a weird feeling. I currently take Sumatriptan as needed. Please, can you advise what to do? As it stands the next neuro appointment is after four months, added complication is that I have been breathless and unable to climb stairs without stopping and panting for past four months. I am having heart tests on the weekend. But, what do I do about my brain?