Should I eat the cheese-containing food from home if the fridge may have cross-contaminated it?

We had some cheese (from tesco i think) in the fridge which after it had been opened and used i discovered and it did not have a suitable for vegetarians sign on it. I told a family member about it and it was thrown out as it could be haraam. I have now got food from home to eat which has got cheese in it, not the same cheese its a new one but the thing is i dont recall anybody cleaning the fridge, as i said the cheese pack had been opened and so some efects of the cheese could have got onto the fridge shelf and could have got onto the new cheese.
am i going over the top about cross contamination? should i throw away the food or eat it?