I've worked at a hotel as a porter for two years. We have the regular manager/assistant relationship. She tells me what to do and I do it. But today when I went in she called me into the office and told me my work was below standard. I explained calmly that I was sorry she felt that way but I had been having to carry a two person shift on my own (my workmate has been off sick for two weeks) and that I was doing the best I could. She said it wasn't good enough and to work harder. It kind of escalated into a minor argument between us until she told me to leave the office. I carried on with my shift as usual and we didn't speak for the rest of the day. But now I'm kinda scared. Could I lose my job over this?