Can you cure UTI's without going to the doctor?
Nope. Once you have one, only antibiotics will make it go away.
As a side note frequent UTI suffers are often counseled by their family doctors to incorporate Cranberry juice into their diets as it aides in the prevention of bacteria sticking to the inside of the bladder walls. It is considered a "treatment" for UTI by many alternative medicines sources but is not recognized as such by the A.M.A.
You can't "cure" symptoms, vomiting is how your body "fights" whatever is causing you to feel sick, like the flu. In most causes doctors don't cure the illness that can be left to run their course, they just stop the symptoms by giving you medication to stop the nausea that causes you to vomit and let your body heal itself.
You will need to get antibiotics to cure the infection. Azithromycin (1 gm) is the drug of choice to cure the infection. In the US, antibiotics that cure chlamydia are available only with a prescription. However, some states allow "expedited partner therapy." That means that if your partner was treated for chlamydia, the partner's health care provider can write a prescription for you without you making a visit or even being a patient of that…
EVEN IF YOU DO see a doctor, there is no "cure" for genital herpes. If you DO see a doctor, the best they can do is give you prescription medication that will help control the "outbreaks" on your genitals. Once you get herpes, the virus stays in your body, sometimes dormant (no visual outbreaks or symptoms), and other times not dormant.