appetite

Hi everyone I am 8week 2 day beginning of my pregnancy I had a huge appetite...Since lastweek I do not have any appetite to eat food I do drink a lot of liquid...i am very tired lately and I'm having problem with  lights I can not focus on the tv or my telephone for too lone.i am feel down down and I do hope it's get better sometimes I get really emotional and just want to break down in tears is any one having the same problem.