I have PCOS could i be pregnant?

I have PCOS and think i may be pregnant. I don't have regular periods and have stopped takin the pills to regulate them for about 2 months now as we want a baby. I feel sick all the time and also fell bloated all day aswell. I have had a little spotting last week that lasted about 2 days but it was very very light. i am having cramps alot but not as bad as when im due on. I do need the loo more often but have had a negative pregnancy test. What are the chances of me being pregnant even with that result. What should I do?