Feeling guilty for being bossy. Any advice?

Hello I sometimes become very frustrated with my step dad because he is always on the computer doing what I don't know but things are neglected. I was stung twice in the same area and swollen up severely and in pain. I was adamant and I guess giving my Mom pressure if they didn't get an exterminator to get rid of the wasps nest. Then my Mom was upset because I was going on about it! I feel really guilty when I am not patient with them both. I tend to go on about certain things and raise my voice, but I was worried I would get stung again it happen twice in 2 weeks and it is very painful. I even said if they don't do it I can't come to work but they didn't care he said it was to expensive but has the money! Have any of you raised your voice or gone on about something too much?? Feeling horrible with guilt!