Hi again,
In one way it is good to know that you do not have the gene for hypermobility of joints, as there is little to do to change your genes.
The two main problems seem to be the shoulder and leg.
Initially these areas should be treated separately.
The more you report the more likely it is that you have a nerve compression at C6-7. This area can give a very broad referral pattern on the affected side.
The pattern, if you have all areas active, can refer to the bottom of your shoulder blade, up the neck, back of the head and behind the eye as well as down the arm along the tricep around the outside of the elbow and to the hand, mainly thumb side. The feeling to the face can also occur.
The worse the compression the more of the above symptoms you may experience.
What I said before about the shoulder alignment happens as a secondary problem. The sub deltoid bursa can become inflamed, jamming the shoulder. Shoulder pain of inflammatory nature will usually cause worse pain at night and in the morning. Nerve pain is deep seated and hard to describe - usually not pin pointed by a finger point but described by a wipe of the hand.

For the neck you will need to have quite specific treatment to the neck Wikipedia reference-linkfacet joints at this level. Neck traction and mobilisation is best - not manipulation.
The deltoid bursa needs deep tissue massage.
The pectorals require stretching, the rhomboids need to be strengthened, shortened and have their endurance increased. The shoulder exercises need to be gradual and progressive - I can send them to you via attachment if you wish.

The sciatica may be from a discal bulge given the sharp pain into the leg, but may also be due to the piriformis muscle being tethered to the sciatic nerve. If so, deep tissue massage will be necessary. Done properly this will be very quick but brutal. You may have bruises on the treated buttock. Light massage is useless. stretching without the deep massage can work but not in the long term. Sometimes stretching without the massage aggravates the problem.
It is wise to treat the piriformis first, do a set of exercises for hamstring and gluteals, then assess how much improvement occurs.
Should symptoms remain, they should be assessed to see if they could be related to discal problems - lumbar traction may help, or lumbar extension exercises.

Remember, discal changes need to be worse than moderate before symptoms are attributed to the disc. That is, you can have small to moderate bulges without symptoms.
This explanation is getting very long. If you would like more details, email me.
MrPhysio+