Teething?

Sarah

*edit* mystery solved the baby tested positive for strep 😭

So my 3 year old has strep throat and now the baby is having diarrhea and waking frequently during the night crying(he has slept all night since about 6 weeks old) no fever, is this strep or teething? He’s almost 4 months is that too young for teething? We go to the dr Monday but just wanted some input. Thanks!