Diarrhea

I have had diarrhea twice today and I'm wondering if I should be concerned. I'm 29w1d and this is the first time I've had diarrhea. Generally I am either a tad constipated or I poop totally normally. I've had a few days of loose stools before during the pregnancy but never full on diarrhea. I did eat Mexican tacos at a taqueria yesterday and then fried pickles last night (neither of which are a part of my regular diet) so I'm wondering if it's just the new, unhealthier foods that are throwing my stomach for a loop or what? I would be worried about food poisoning but I don't have any nausea or intestional cramping whatsoever. I've had salmonella before pregnancy and I never had nausea but I had intentional cramping so bad I almost went to the ER.