Feeling dizzy/can't think straight, low blood pressure or prediabetes?

[Crumbsinthecarpet]

Hi all, planning on going to the doctor's soon about this but wondering if anyone has gone through anything similar
I've always had pretty low blood pressure, 100/60 or lower usually and easily go faint, and start feeling very shaky if I've not eaten anything in a while

I'm wondering if my dizziness/sick feeling/fuzzy head/headaches is related to either low blood pressure or (hopefully not) pee diabetes

For context I do a lot of running (I'm marathon training) and I would say I'm pretty healthy, I'm either eating around the same number of calories I burn a day or in a calorie deficit but despite this, I'm not losing any weight so can't be eating way too little... I'm just confused! Any opinions? Sorry if this is unclear, as I said very fuzzy headed

Could be Autonomic dysfunction/POTS?

I feel like that (headache, shaky, fuzzy headed) when my blood pressure is high.

Also, I felt like that a lot when my oestrogen levels were very low (HRT to the rescue).

More likely iron deficiency or low ferratin. I had these symptoms when my ferratin was 7

@Crumbsinthecarpet I know this post is old but did you ever get to the bottom of this? I am experiencing similar issues with low bp