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Your symptoms suggest that this may be Sjogren's Syndrom. Which is an autoimmune illnes, with no cure, treatment available give relief in symptoms only. You need to see a physician and do some specific tests like ANA, RA factor etc to confirm the diagnosis.
For dry eye
you can use eye drops which provide lubrication, also use glares whenever you are outside. Avoid rubbing the eyes, and spending too much time in A/c.
For dry mouth
, well plenty of water and fluids is best solution.
Lump in groin has to examined by a physician.