Fatigue, passing out, warped peripheral vision, loss of hearing are symptoms of?

[ald0093]

I am a healthy 24 year old woman.  I run every day and have a fairly healthy and balanced diet. When I run, sometimes I black out and lose hearing and vision for 10 to 60 seconds.  In the past I have passed out completely.  When I was 20 years old this started happening.  It would happen once a week and then stopped.  Now it is starting again.  Yesterday I was running 5 miles at an easy pace, my heart rate was below 150 bpm and my peripheral vision became warped in my right eye.  This began around mile 2 and continued for the rest of the run.  I couldn't read my text messages at the end of the run.  I've never had warped peripheral vision before so it scared me.  I read that migraines sometimes cause these issues but I haven't dealt with problems from them before.  

I plan on going to my doctor this week, just looking to see if anyone else has experienced this before or has thoughts.  Thanks.