Had a crazy hormonal day

Hi ladies I Ll be 37 weeks pregnant tomorrow. Today I woke up feeling sea sick and with a horrendous headache. For some reason all day I am agitated and feel angry. The sound of people chewing is irritating me so much or the tap dripping. I am so tired but I am that agitated I can't sleep. I am normally a very patient person but I have lost my temper with my 3 year old twice which I feel terrible for, I had to tell him to go to his room to calm down then I apologised. Any advice please xx