TCC for 6 months

I was supposed to start 10/8...I'm showing no signs of starting. I'm crying at the drop of a hat for the last 2 weeks and extremely moody. I've taken 3 hpt and all have been negative. I'm also nauseated in waves and mostly between the hours of 3 - 6 am. I have 1 daughter who is 16...it's been so long since I've been pregnant so idk if it's just my head playing games or the real thing. Any suggestions??? Help...