In Early September I was an au pair in Italy, but because I'm American I can only stay in the Schengen Zone for 90 days. I decided to continue as a nanny in Manchester, UK until my 90 days were up. Essentially, I said “working” to the UK border, so they sent me back to the USA.
My passport now has an ‘X’ across the Manchester stamp. Will this affect me re-entering the EU (I go through immigration in Portugal, despite my final destination being Italy)? Or am I better off getting a new passport? I’m not sure if they share the same database, but I don’t want to run into any issues again.