If I accidently flushed a rolled up maxi pad down the toilet 13 days ago and it hasn't clogged up, does that mean I made it through the toilet line or should I still be worried?

A agree with Rooster.  You should be fine -- for now. 

But it might become you and and your neighbor's problem long down the road since it has now been added to the thousands of other non-sewar-compliant junk collecting and clogging the main sewer lines.  In some cases it means that some poor soul has to go into that sewer line wearing a hazmat suit and physically remove all that nasty junk from those lines.  I wouldn't wish that on my worst enemy.