you have pain abdomen and increased frequency of micturition..
burning pain abdomen could be due to the drug induced gastritis
.. and urinary tract infection
see your gynaecologist for the examination and urine examination...
and also take serum HCG
levels for the confirmation of pregnancy
for UTI, need to take antibiotics and urine alkanisers and drink lot of fluids..
maintain good genital and menstrual hygeine..