Welcome to HCM,
You have suffered UTI recently and was treated by antibiotics although it is possible to have UTI again but please do not take treatment by yourself same medicine as it may harm.
You need to see a doctor and test for urine and Culture and sensitivity for proper antibiotics to be given.
Apart from UTI there are many causes for pain in abdomen and yellow urine for example hepatitis
and even many drugs can cause it so please do not worry just visit a doctor and after proper examination and investigation you will be treated and will be normal in some time.
If you take tobacco please stop it, possibility of bladder cancer
depend on your age and if blood is there in urine then a Ultrasonography
may be required.
Please take care