It sounds like you really need to see your doctor
as soon as possible. There are several different potential causes for your symptoms, and your primary care doctor
should be able to perform a complete physical examination and help you get to the bottom of things.
that is worse with bending over or with coughing and sneezing is often related to sinus congestion. These are small spaces inside your skull that can become plugged with mucus, often in the setting of allergies or a cold. When this happens, the resulting buildup in pressure can create a headache that feels like a sensation of fullness over or under the eyes, together with a 'swishing' sensation when bending over. Fortunately, if your doctor diagnoses you with this problem, there are excellent medications that can be used to help clear out the sinuses and get you back to feeling normal again. Occasionally, in severe cases, antibiotics may also be needed.
The fact that you have burning with urination may or may not be related to your other symptoms. One possibility is that you are dehydrated and that the concentrated urine is irritating when it exits.
Make an appointment to see your doctor as soon as you can.