I've Been Coughing The Last Couple Weeks, Then Yellow Mucus

I've been coughing the last couple weeks, then yellow mucus started coming up, now it's green. I have not had a cold, I do take allergy meds, and I have been doing remodel work in my home while still living here. The cough is real raspy feels like deep in the chest, and laughing always triggers it. So am I contagious? have a new baby niece and I've been staying away as I don't want her to get it if I am. thought I was getting better, but a friend told me today I sound worse, and she thinks could be bronchitis.