Cardiovascular disease is often referred to as the "silent killer". It results from among other things high blood pressure and skewed lipid profiles. The problem is that there may be no symptoms of either elevated bp or lipids. This should be of grave concern as I believe cardiovascular disease, heart attacks and strokes kill more people than AIDS, cancer and other ailments combined. Therefore you should have levels checked yearly and run proper supplementation and diet year round, not just for ph/ps/aas cycles.
As for symptoms, there aren't too many for elevated lipids but ther are some for bp, including headache, dizziness, nausea, shortness of breath, and blurred vision. I haven't seen any studies showing nose bleeds associated with increased bp due to androgen usage. I did see a few studies that showed other drugs that caused a rapid 10-20% increase in bp that would result in nosebleeds. If the drug was taken for more than 3 days nosebleeds were one sign of elevated bp. It seemed that this had a higher correlation in elevations in diastolic pressure. It seems reasonable to assume that steroids which act in the same manner of fairly rapidly increasing bp especially diastolic could also cause nose bleeds.