Hey Alan,
I'm only a beginner but as a medic I've put a lot of my concentration into learning medical signs.
I'm not able to do a video at the moment, but I imagine it would be:
Feel - one, or both, index fingers running a vertical offset line up your torso. Lip pattern "feel"
You - point at the person. Lip pattern "You"
Sick/Vomit - one, or both, hands in a fist on your chin opening up flat and moving forward and downwards (miming someone vomiting) lip pattern "sick"
I'm not 100% certain on the order of the signs but I think the above is right. There's a great app called Sign BSL that has all 3 signs on there.
Hope this helps!