When i lay on my stomach i feel pressure in my head no vision changes or nausea and after i stand up from laying on my belly i get a quick sharp headache maybe a minute later what are your thoughts on this i have ehlors danlos and cervical migraines?

If you don't experience the symptoms when lying on your back or on any other occasions,I attribute this entirely positional symptom to kinking your neck & pinching the occipital nerves that run from the back of your neck up to the back of your skull causing head discomfort. If you still have concerns, consult your neurologist for evaluation & advice.