For most of the day, I ve felt like I needed to pee. When I sit on the toilet, I get an instant prickly feeling from sternum up to the top of my shoulders.... kind of like the sting in your chest if you coughed too hard and were deprived of breath. It doesn t last long. I have no other symptoms like pain in the chest, droopy face or arm pain. It s mostly in the upper back of my chest. Also, I don t really need to pee. Any ideas? I take metoprolol, losartan and coumadin for a MVS replacement 7/12.