Hello and welcome to HCM.
Thank you for your query.
Yes, it does sound like a
urinary tract infection, let me list all the symptoms for your future reference:
-Burning sensation while urinating
-Frequent urination
-Increased urge to urinate, but less amount of urine passed
-Chills
-Fever
-Lower abdominal and/or flank region pain
-Itching around the genitals
-Blood in urine or immediately after (not always seen)
To confirm this you would have to get your urine analysed, and visit a doctor with the report who will advise you medication accordingly. In the meantime, consume plenty of water and cranberry juice if available.
Yes, excessive or increased exercise can certainly cause irregularity in periods.
I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications. I would gladly help you.
Best wishes.