28weeks pregnant ate mexican cheese and now i have diarrhea help?

Sunday my mother came back from her trip from mexico and brought back some mexican cheese, i only had a small piece but woke up on monday with diarrhea. ive had it for 2 days now no nausea or signs of listeria or salmonella, I need some real advice. Help someone. all my symptoms are is diarrhea and once in a while stomach pain that does not last very long.