Could you please tell me how to manage uti symptoms (painful bloody urination, abdominal cramps, lower back pain, nausea) when i don't have access to a medical clinic and pharmacy?

No simple answer: Your description sounds like you may have a "complicated" urinary tract infection, involving the kidneys in addition to the bladder. There is a significant chance of this becoming a serious illness. Your should seek qualified medical evaluation and rx ASAP. Other than drinking lots of water to maintain good hydration, I am not aware of any activity, food or substance which is likely to help.