Is it wrong to not feel horrible about?

The other day I bought a pot of yogurt and four teaspoons into it I realized I hadn't checked the ingredients and sure enough there was halal gelatin in it. I did have an oh sh!t reaction and felt a little guilty and stopped eating it immediately and gave it away to a family member BUT I didn't feel that horrible about it I just kinda moved on from it in 5 minutes. I always check the ingredients of anything I buy I dunno why I didn't this time :S anyways is it bad that I didn't feel absolutely terrible about this?