I’m gonna lose it

All week at work, I’ve been absolutely swamped, doing the work of two people, while my “team” have pretty much sat on their arse, talking, playing on their phones, not once has anyone even thought to help me a little. I’m hardworking and good at my job, but does that mean everyone else can just be lazy and expect me to do it all while they do nothing? Do they not realise how selfish they’re being? If I open my mouth I’ll say something I regret.