I have been in contact with people that have been in contact with positive people. should i be worried, worse i have flu together with my mom and kids and we stay together in the same house?

Stay home: Because you are already sick, unless you have tested positive for the flu and negative for covid, assume that you have covid. Self isolate with your mom/kids. Drink lots of fluids, esp electrolyte solutions, get plenty of rest, don't let anyone else in the house and don't go out. See a Dr for problems breathing, blue lips/nails, chest pain, confusion, and lethargy. The illness can last 2+ weeks.