What Causes Chest Pain, Heart Palpitations And Shortness Of Breath?

Question: hello. I have been dealing with a lot of symptoms lately and I don't know what's happening. I had a lot of chest pain and very hard heart palpitations. some shortness of breath. I had a lot of the heart tests done( heart monitor, stress test, echo, blood work), which all came back normal. They said it was anxiety or something but I know that this is not the case. My knees started swelling up really bad and filling with fluid, and I couldn't walk it was so painful. I now have terrible knee pain, hip pain, and back pain. my whole body hurts and is in pain a lot where I can't do much actively. my heart also seems to be effected. It just feels like something is wrong. I have chest pain, shortness of breath and the weirdest palpitations . sometimes they are violent and it beats like 6 times extremely hard..some days it's 10 noticeable palpitations and some days less. they are scary. I feel my heart working if that makes sense. before I wouldn't notice it but now I always feel it. I can feel it in my ears and neck. I can feel it beating fast and noticeable. when I stand up I can feel it
working hard and beating. I feel it beating everywhere. if I'm holding a glass tightlyfeel it besting in my finger. I can touch my ear next to my temple and feel it. if my penis is erect I can feel it pulsing. its like I can feel the blood pulsing all through my body when I've never been able.to unless I was really looking for it. what could all this mean? I don't know how else to test my heart but something is wrong
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I might have arthritis could this be doing this to my heart? Also with the super stiff neck and sore throats maybe some sort of infection. also I was thinking food allergies or something with my blood vessels. I'm having trouble getting answers other then anxiety when I know its something wrong. I haven't felt normal in months. Any ideas would be greatly appreciated