Yes your presentation does match that of an infection and so I would advice you to get your urine examined, along with a vaginal swab test and an ultrasound
examination. Causes vary greatly and so an elaborate evaluation will be required.
In the meantime, avoid sexual contact and the use of tampons. If you choose to use tampons or pads, please change them regularly. Also, keep your genitals clean and dry and drink plenty of water.
Hope this helps.