I think my dog ate chocolate?!?

I let him out while i was feeding our 2 month old daughter and when i let him back in he had something that looked like crap on his face. But it smelled like chocolate. There were gobs of it. I do t know how much he ate but there was some ib the yard i cleaned up after i washed his face off. Ive never seen chocolate in the consistancy before. It was like, semi solid crap. Thicker than pudding. I do t know what kind it was or how much he ate but its been half hour and hes tired. I wanna know what to watch for so i can take him to the vet if needed and not jf he ends up being fine as we dont exactly have money for it. And how long it would normally take for symptoms to show if he dkes have any. Tbanks. Please no rude comments or telling me i should take him to the vet. Basically i dont have a car for 4 hours, i have a 2 month old im home with, amd we dint exactly have money for it.

Hes a 14 lb cocker spaniel shitzu and he is 8 months old