Thanks for posting your query.
As far as crystals in urine are concerned it can be due to UTI, kidney stones and dehydration
.Diet that is rich in protein and oxalates can trigger crystal formation in urine. You also need to know status of your asthma, as long standing asthma can effect cardiac health and rhythm. Difficulty in urination can be due to UTI or bladder stones.
If all these things are ruled out and nothing is found then it may suggest Autonomic neuropathy which presents with dizziness
or faintness when rising or standing,vomiting or feeling nauseated when eating,disturbances with bowel movements, bladder control, or sexual functioning.
Some factors that may increase your risk of AN include diabetes, alcoholism
, autoimmune disease
, such as lupus, HIV, Parkinson’s disease
Visit an expert for thorough physical examination and necessary tests.tilt-table test to monitor blood pressure during posture changes may help.
Hope it helps.