Ocular/Retinal Migraines For Years

I have never really suffered from headaches during my life until now (i'm 29). There is no family history of migraines.

Out of the blue, after a family function 2 years ago, we got home and I noticed the image out of my right eye was 'cloudy'. I wear glasses so immediately thought my glasses were dirty. I got a shock when taking them off to find it was my eye! I was a bit concerned, then 30mins later I had the worst headache in my life. I had to go to bed early. At some points even the sounds of the TV from downstairs were making me feel sick. It was as if every sound and sense in my body had been amplified. I think there might have been a tiny bit of twitching but can't confirm now as memory of it is a little hazy.

I woke up the next day feeling normal again, and put it down to hangover or just a 'bad headache'. I went back to my daily job (work in IT) and didn't think anything of it. The same thing happened again about a month later, this time not a headache as much, more visual symptoms. After 3-4 hours it passed and I was back to normal again. 

The frequency of them started changing from one every month, then around Jan 2013 one every two weeks, and since around June 2013 one every 7-10 days. 

At this moment in time I am off work due to depression/anxiety (Since Feb 2014) and currently can get them every 2-4 days. Last week I had four in the space of 7 days. 

What I experience now: The 'trigger' feeling that I know one is coming is slightly worrying; I can visibly see my pulse (vein shape) pulsing in my right eye's vision to my heartbeat. This goes on for about 15/30mins, then I start to get spots/lines/an 'arc' shape which will sometimes be there and sometimes now. I will also get moments of no vision in that eye 'black spots appearing over the central vision'.

When I read of people with 'ocular' migraines they note these symptoms usually leave after approx 1 hour followed by a blinding headache. My concern is the aura stays with me the entire course of the migraine - approx 6-9 hours. I believe I have 'retinal' migraines. Difference being I ONLY get the aura in my right eye. If I patch the right eye my vision is normal out of my left for the entire 9 hours. Also my head feels incredibly tight and sometimes will get a throbbing pain just above the tear duct on the right side of my noise. 

I have had my eyes checked and been told the pressure is fine (no risk of glaucoma). Also my blood pressure is normal/high (bearing in mind I do suffer with anxiety/depression).

I am at my wits end trying to work out what triggers them. I have spent months cutting out caffeine/alcohol. It made no difference. I have also tried limiting my use on computers/phones whilst I am off work. No difference. 

The only relief I have found is through exercise. I typically don't do any sort of intense daily exercise, maybe a 20min walk a day and household chores. 

2 Weeks ago, I decided to start an exercise regimen. Did jogging/walking for about 45mins-1hr each day. I went approx 10 days without a migraine (usually it's every 2-3 days at the moment). I am wondering what in the exercise is causing this relief? Could it be hormonal or just a stress reliever?

I don't smoke and don't drink much alcohol any more. I do have a bit of a weak neck - maybe this has something to do with it? My main concern above all else is it's not your typical aura, I only get it in one eye. 

I have also noted that I have never had a migraine before 1PM and after 10PM (apart from one rare occasion at 4AM when I was having a panic attack in bed). Something is happening between approx 2PM-10PM to trigger it, but I don't know what. 

I'm a bit of a hypochondriac at the moment, thinking it's a brain tumour or i'm at risk of stroke. I wanted to get a scan but GP said "if you would have had a brain tumour since 2012 you would know by now" and suggested meds.

Does anybody else here suffer from their 'retinal' migraines, or can offer any support or advice?