I have never followed 'what not to eat during pregnancy' guidelines. The only thing I follow is my instincts and cravings Lol.
For some reason being pregnant made me crave all the things I shouldn't have and I ate them...including Macca's sundaes
The conceren is listeria, so if the place looks dodgy or you are unsure, then don't eat it. Things like Deli salads I would avoid. I at salami from a deli as long as I saw them slice it fresh and usually ate it within two days.
Trust your own judgement...my favourite thing to eat was egg, bacon and black pudding sandwhiches, had them nearly every day for lunch while on Mat leave. As far a sushi goes, it's usually the rice that would be the concern as rice is probably one of the worst for being susceptible to listeria if it's not fresh.
Not sure about the tea, I drank coffee and also had a glass of wine at night with dinner.
Yes you need to be a careful, but you also need to eat