Tachycardia episode after eating after small workout ? (stretching, yoga...)

Hey everyone, I read a few posts on this community and the POTS one but haven't see something clearly similar so I thought i should ask.

I have exercise intolerance and chronic fatigue due to Long Covid, POTS , dysautonomia etc but as my chronic pain is getting worse and worse over the year, I am trying to slowly build up some strength to support my body to function especially with hypermobility. I do short walks but am currently in a process to do NON weighted workout that look more like some lying down yoga / pilate.

After a session, i often start having tremors, shakes i feel a little dizzy and get freezing. That does not happen while working out but after. Even my HR is under control during the session.

I start feeling shaky when i stop my session and get really cold. Then some adrenaline urge / feeling if i stand up / move but the episode gets worse when i start eating and tachycardia will spike then. I hydrate myself while working out so it's not due to lack of water.

I explain the eating part because it seems to get worse when i do this in the morning with no food / fasting and when i break the fast the tachycardia can last for hours afterward between 100-120 sitting / lying down (aprox). I dont know is this is a usual thing with dysautonomia and pots. It does not happen with my walks so its specific to this type of exercise i believe.

The shaky freezing part happen no matter what as an exhaustion response or because my body can't handle the stretch / muscle solicitation. I also get inflamed in the chest (i seem to have tietze / costho syndrome so the shortness of breath comes with post exercise)

I suspect it may be linked to glycemia and issue to control it but i haven't done any monitoring yet. It's always fine on blood test. BP is 11.7 rn while having an episode, i am usually 9.6 or 10.6 so its not BP drop either.

Any similar experience ? Advice or insight would be very much appreciated. Thanks