First month off BC

Hi all! I stopped taking birth control and am midway through my first month off of it. I just finished ovulating and am having crazy symptoms, back ache, slight nausea, slight headache. Do people rrally get symptoms from getting off the pill or could this be early pregnancy symptoms? I know docs recommend waiting a month after stopping birth control to better know your due date but we couldn't wait! Are my chances of conceiving less because I was on BC for so long and I just stopped? Any advice would help! Wish me luck!