Not sure what's going on

I've been on glow for awhile and like all the post and feedback I read but this is my first time posting but I really could use some help or advice.  My husband and I have been ttc since August.  When AF comes every month we just keep trying.  This time I'm devastated.  I really thought I was pregnant.  Last week I started feeling nausuas, throwing up, sore breasts, and very tired.  No signs of a virus or flu.  All of that started last Monday and today AF came.  I am so confused why I was having all of these symptoms of I'm not pregnant.  I was so sure AF was not coming. Has anyone else had this happen?