Paulie,
Don't you worry if you have some problem with regards on your medical examination they will refer you to an specialist and if true that there is a problem you will undergo on a treatment then if you are ok, your papers will be continue processing. Maybe you are only nervous when you conduct you medical examination thats why your high blood. Try to eat quaker oats every day and drink lots of water.
To share with you, I have this neighborhood that has application on canada as like our application. They are family, with two kids, when they conduct medical examination, x-ray said that the father and the one kid has problem on the lungs, they have spot. They undergo mediication then after medication canadian still gave their visa now they are on canada last December.
So dont you worry ok....
josh