give it a few days and test again? keep bonking at will? The doctor, I can almost be certain, won't be able to give you any better information than you already have from Kellymom.
You could also call a breastfeeding helpline and talk through the nuances of your own situation.
How old is your first? How do you feel about tandem feeding? Have you read personal experiences on here of what bfing through pg is like? Weighing the benefits of continuing to breastfeed versus, cessation of feeding, your biological clock ...
Depends on what your plans are. And how you respond to those questions and others will help you make the decision for yourself.