Think I have POTS

Hii! I need some advice!! So I am almost positive I have pots - I hate standing up for long periods of times, I get lightheaded etc but recently I have been waking up around 3am in a panic or I’m overheating or something idk it’s really bizarre… and my heart rate skyrockets…. Do you guys have any advice? What tests should I get done? I can’t tell if it’s anxiety or what.