POTS or overstimulation and light sensitivity?

Hi everyone

I was diagnosed 2 years ago and have been learning a lot since then.

Recently I've found that I've been having quite a few non-specific challenges: - dizziness and brain fog that worsens towards the end of the day - faintness when standing from sitting - exacerbation on hot days - extreme fatigue most evenings - difficulty waking in the morning - a weird kind of 'lump' in my throat that's not really there but feels really irritating

I have chronic health issues - chronic period pain (likely endometriosis), hyper mobility and possibly EDS, possibly lipoedema and I'm suspecting POTS due to the head spins and wooziness when standing. I'm also low iron but not anaemic and my doctor basically said we have to fix my heavy periods first and not to bother taking an iron supplement.

But I've also put some pieces together and realized that my home office is in front of large windows that I sit in front of all day. Our aircon has also been broken (it's hot at this time of year where I live).

I've recently started taking zepbound and have found my symptoms have become worse. But I'm starting to wonder whether the dizziness, fatigue and brain fog are actually due to overstimulation from the heat and light.

Would this make sense? How do you experience overstimulation?