When I stand for more than a few seconds and my heart starts to race and blood pressure drops, I sweat like crazy, even I am outside in freezing weather.  I don't know what to do.  

After a shower,  I'm sweating, before I can even dry myself I'm sweating becUse of standing and ❤️ pulse elevating, tachycardi over 110 up to 130s upon seconds of standing.  Just standing.  I hate it!