What Causes Back Pain And Stomach Discomfort While On Contraceptive Pills?

Hi, may I answer your health queries right now ? Please type your query here...arnd january i startd contraceptive pills not on my perind day,didnt take them daily.feb had may periods right not with a pill though.my period started 28 march with a severe period pain,i took ibrufen jus lasted 4 hours,after that i bled 5days i stopped the pills on ma last day i then bled 5days after i suspected pregnancy i bled for 2days skipped 2days then bled again 4 2days..after that i was diagnonised 4 ovary and bladder infection after experiencing back pain,bladder ful.......2day the 15 may i havent had my period just got funy movements in ma stomach like gases and ticklings.i last had protected sex 3march could i be pregnant or its just upset stomach