Confused I need help...

So I'm 6 days away from my AF.. for the past few days I've been cramping on and off and boobs have been sore etc... the normal PMS symptoms normally I don't start cramping until the day of so now the only thing I'm confused is that me and my S/O have been ttc. I've not had any kind of bleeding or spotting which is worrisome. If I didn't or haven't gotten any kind of implantation bleeding does that mean I'm out for this month?? I need answers and advice when can I take a test if I should. It's my first month actively trying and I keep having down thoughts that I'm not going to get lucky my first time.