Pot symptoms, feeling unsure

I have ADHD and mental health issues. I spend a lot of time laying on my bed. I thought my physical symptoms were because I’m out of shape or due to my mental health. But I’m starting to consider it could be pots?

I have checked my heart rate on my Apple Watch and it is about 80bpm when laying down, then around 120-130 when standing for a full 10 minutes.

My symptoms feel mild, but the brain fog affects me the most. I’ve had these symptoms for at least 8 years .

My other symptoms:
- Excessive sweating under arms
- standing up I feel slightly dizzy and my hearing gets muffled for a few moments.
- I sometimes get tinnitus in my left ear.
- my stomach feels tight and bloated and it feels hard to take a full breath.
- I think my hands often have white marks that indicate blood pooling in them. As well as my feet can look purple.
- mild fatigue
- I feel clumsy when walking around doing chores and just want to sit down

Should I pursue an assessment with my doctor? I feel silly about it because I know I am out of shape and don’t look after my health due to my mental health, so I feel like it’s my fault.