Could My Plan B Pill That I Took October Be

could my plan b pill that i took October be causing me to not be able to conceive due to hormonal imbalance, i was short both last month on my period they both lasted for no longer then 4 days which mines last always 5days and on time before the plan b and iv had a lot of pregnancy symptoms but not positive results, i am trying to conceive now and have been since december