If you are sure about £ęczyca, maybe try to contact the hospital where you might be born.
Check the website: zozleczyca.pl
It would be extremely hard to find someone just by a name - yet you're not sure if your Polish name was Justyna or Anna (maybe both?)
But write an email, it's possible that someone give you some clue, further search direction.
I hope you'll reach someone from your Polish family.