Question. Baby girl is 3 1/2 months old. She's teething an lately she's been really cranky if me or…

Question. Baby girl is 3 1/2 months old. She's teething an lately she's been really cranky if me or the hubby aren't with her. Well her right eye is now getting stuck closed after naps from goo while she sleeps. I think she has a cold cause she is stuffed up but my question is when should I take her in? Like idk if it's from the cold or something more