Blurred vision in right eye after workout session.

PLEASE see a doctor. My mom had symptoms like that during/after some rides and hikes and it turned out she was having TMI's (mini-strokes). She thought they were migraines or dehydration. Could easily be either--migraines can feature vision problems in one eye and nausea, but there is usually some degree of pain as well, usually on one side of the head. If migraine, maybe triggered by hormones, caffeine, and/or dehydration.  Two coffees plus Red Bull plus the caffeine gel to me sounds like a lot of caffeine, but I wouldn't automatically assume that's the cause. It apparently can be hard to tell the difference between "complex migraines" (where there are visual and sometimes other neurological issues as well as headache) and TMI's without medical tests.  TMI's cause brain damage over time and indicate underlying medical issues (in her case, high cholesterol due to genetic factors), so you need to rule that out.

In either case, it sounds like you're not happy riding or safe driving home. In one case my mom almost lost control of the car with similar symptoms. Please, check it out with a doctor.

Go to the doctor. You may not think it's something serious, and it may end up being nothing serious, but go to the doctor.

In 1996, I went to the doctor because I was getting a strange feeling in my chest when exercising. I was 32 years old.  I thought it was a chest cold, but it wasn't anything I had experienced before. My doctor sent me to the hospital for observation, and it ended up being a 95% blockage in my right coronary artery. I am now fine and have no physical restrictions, but if I hadn't gone to the doctor things might not have turned out so well.

I don't want to panic you, but I want you to go and be sure it is nothing serious...please take care...

That is really, really scary. Can't believe you did a HIM, esp. the swim, with this still unresolved. Yes, it can take a long time for doctors to figure things out, but cardio/neurological symptoms are not something to play with. I don't see how neurological issues could cause chest pain. More likely heart or respiratory problems, or possibly some kind of panic attack/anxiety that might be unrelated to the other issues.  Not an MD so no idea what the relationship is to the vision issue, but I've been through enough health scares with my parents and I really hope you take some easy/off time until you get to the bottom of this!

Congratulations of finishing the HIM. I agree that sounds really scary.

I have no advice to offer just sending best wishes that you get to the bottom of this, and soon.

Good luck.

The hardening or thickening of the heart walls is pretty common among long-time endurance athletes.  I have it...my cardiologist told me to just come back every 5-7 years for a check-up but otherwise cleared to do everything.  I also have a fairly large heart.  When I'm in really good shape my RHR is like 38, and it's almost impossible for me to get it over 160 (43 years old).

I've had all those tests plus more.  In quick summary: I was born with a congenital defect called a biscuspid aortic valve.  It was first discovered as a heart murmur when I was 5 years old and I ended up having it surgically replaced with a mechanical valve twelve years ago at age 47. Over the years my leaky valve caused my heart to work harder and resulted in significant enlargement of my left ventricle.

One of the symptoms I developed prior to my surgery were optical migranes which were painless but caused double vision and blind spots in my field of vision.

Not trying to imply that you have similar problems to what I did, but that you shouldn't minimize or ignore your symptoms.  You need to keep pursuing things with you doctor until you find the root cause of your issues.  Heart problems are nothing to mess around with. 

Hope it is something relatively minor and you can get it fixed.

Mark