Birth control and pregnancy

Chelsea • Happily married. Have 2 amazing sons and ttc baby #3.
Is it possible to have a good chance of getting pregnant first month off birth control pill? I have had many symptoms ( cramping 4 to 6 DPO, tender nipples for a good 4 days, little bit of nausea and heartburn ) but I tested 9 DPO and it was negative.. Probably to early ? Wondering what my chances are first month off the pill.