I get blurred vision when I exercise or feel stressed. Could this be a sign of high blood pressure? If so what should I do to stop this firm happenin

Doubt blood HBP. This could be a problem called pigmentary dispersion - which is mostly likely in higher myopes. If this is happening consistently then you should see a n ophthalmolgist for evaluation. High blood pressure is very uncommon at your age and does not cause visual blur in any case unless it is crazy high.