Am I right for thinking I might have POTS?

I have so many symptoms of POTS. But the problem is they come and go. Like, for about 2-3 weeks I'm okay and either the symptoms are REALLY hidden or not present at all. But for about a week or maybe even less, I have flare ups. Sometimes, pretty bad ones.

Like, imagine going up the stairs, just 1 floor, and my heart feels like I just ran a mile, my arms become numb, my legs feel like they will give up and I'm dizzy and lightheaded and my vision is blurry. But I never faint. The closest I got was to get on the floor and sit there until I felt better.

I feel like I'm being so overly dramatic whenever I sit on the floor to rest cause I know I won't faint anyway.
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POTS - postural orthostatic tachycardia syndrome
Am I right for thinking I might have POTS?
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