Are there any cardiologists among us? I have tachycardia, I've seen se…

Are there any cardiologists among us? I have tachycardia, I've seen several cardiologists, and an EKG was done, and vitamins were prescribed, and a 24-hour monitoring was done. Ultrasound of the heart was also done. They all say everything is normal. Nothing dangerous. My tachycardia appeared when I was 21 years old, I am now 26, and every year it seems to get worse. When I eat, my heartbeat speeds up, sometimes when I clean at home I lean over and stand up abruptly, almost like my heart would jump out of my chest, sitting down I drink water or valerian root, it seems to normalize. Well, I think that's not normal, can you get