Jo, chances are you're absolutely fine - the day before I found out I was pg, I ate some homemade mayo with raw egg and I also had sushi and unpasteurised Camembert that weekend.
I read some good advice somewhere - pregnancy doesn't make you any more likely to pick up bacteria or sickness than before - it just means it could be more dangerous if you were to catch anything (which is unlikely in itself). Given its a supermarket product, it's highly unlikely to have any bacteria in anyway despite being raw milk - they have to warn people legally though.
You probably just feel sick coz of the pregnancy itself and it hasn't kicked in until now - I'm 9 weeks and I'm fine most of the time but have the odd queasy day too. Just try not to worry! Of OH wasn't sick after eating it, then chances are there is nothing wrong with it and it's just a pg symptom.