I am not sure that these symptoms are related to the medications you are taking. The only way that ticlid or toprol could cause joint pain is by causing bleeding into the joint: is there swelling/redness around it? The easy bruising and bleeding may be related to an increased propensity to bleed seen with pleople on plavix or ticlid. Ticlid can rarely also cause a syndrome called TTP where your platelet count drops dramatically and can cause severe health problems such as renal failure, seizures and fever. Your symptoms are not suggestive of this but just to make sure I would contact my local doctor and get some blood work to address this.
You have to keep in mind that you have a stent in the most precarious position it could be the left main. If this stent clots or narrows even mildly you could have serious problems. So it is important to make sure that you stay on ticlid or plavix to prevent this from happening.