Irritated day before Chemo

I had to take out my son's contact lens last night. I didn't sleep until 11PM.  Both my mom and my husband are worried that i wasn't getting enough sleep.  The other night i woke up early at 3AM, i went onto my laptop until i could fall back to sleep at 5AM.  I went back to sleep, then at 7am I woke up because my son wanted to wake up.  This morning my alarm went off at 5AM.  I forgot to turn it off. Then my mom came down to tell me to get more sleep.  She went on and on about I needed to rest.  In her caring way she told me maybe i shouldn't be on chemo if i can't handle it and can't rest.  I got irritated and told her to leave me alone.  I know she means well but my alarm went off.  I didn't like what I said because she's worried about me. Now i feel horrible.