Mouse!!!

Okay ladies I need some HELP! Last night I saw a mouse run across my living room floor and I straight up freaked out like a child! I live in an apartment complex in California and have only lived here 2 months. I have never had a rodent in my home before. I am a very clean person, like mop the floors once a week and scrub baseboards regularly clean lol. He unfortunately escaped behind the oven where we saw some mouse droppings. This is the first sign we have seen of them, the maintenance man filled the gap behind the oven with foam and laid some sticky traps. I have a 2 month old who is on the floor regularly for tummy time and now I'm grossed out. How do I make sure he stays gone and doesnt bring friends? And how do I find which unit is the nasty host? Will tea tree oil keep them away? Help meee, because if my boyfriend isnt home the next time I see one I may end up burning the place down 😂😂