anyone had this awful virus !!!

anyone else got this awful virus that starts with a sore throat and bad chest,then the runs and bad sickness,we all have it here,my daughter,one year old grandaughter and now i think im starting with it,i have to look after them they are both very ill,i am having a relapse,but havent had time to even think about me,too much to do,they look dreadful,i have heard it can last up to 3 to 6 weeks,i am so worn out with it all,and so worried about my little grandaughter,she cant even sit up for more than a few minutes,we have had her to drs twice this week,because shes lost lots of weight,and she was on the skinny side to start with,my daughter keeps crying because it makes you feel that bad.dont know where to turn.