Home alone with strangers tomorrow?

I'm in Fort Worth visiting my dad's brother and his family. It's a pricey neighborhood and seems very well-protected and there is no theft threat or stuff like that. We arrived by plane two days ago and I was home alone today because my aunt and uncle had to work and they took my baby cousin Jeremy with them. My dad is getting a vasectomy so my mom went with him. So I was home alone with the dog today and everything went fine. But tomorrow two men who work for some company are coming to fix a moldy room in the house and I will be home alone with them tomorrow and I'm getting nervous. My boyfriend is back home in Maine so he can't be here to protect me if something bad happens. My family ures me I'll be fine but I'm still worried. I'm only fifteen and I'm not totally comfortable with the thought of being in an unfamiliar environment with two grown men I don't know with just a grown labrador as my security (plus Brinks, but kinda defeats the point if they guys get access without setting the alarm). I can't go with my aunt or uncle and my parents won't be back until tomorrow afternoon. My baby cousin Jeremy is only four months old and that's why I can't go with him to daycare. I feel like I should be strong and mature enough to deal with this since I'm almost sixteen but I still feel nervous about the whole being around two strange men in my uncle's house by myself for a few hours. Does anyone have any safety recommendations or ideas on what I can do? Everything is appreciated!