I thought Canada had a system of clinics that can help you out. Beyond mixing with nitrates, ED drugs are safe if taken in reason. Either way a clinic, will look out for you.
Yes, 38 is somewhat young, but I wouldn't worry about it. Worry can be part of the problem. Stress, alcohol and lack of exercise can also add to the problem. I've been taking ED medication since my 40s. No big deal. Some days I wake up rarin' to go naturally, some day not so much.
A perfect day would be waking up rested, a quick turn on the treadmill, steak for lunch, a little alcohol at the pool with some bodacious, tan bodies walking around. Unfortunately, most days aren't like that.