TTC symptoms ????

Al
I have been ttc for about four months now, I'm now 6 days until af (it's 1am) 8 dpo and tested negative yesterday. Having terrible cramps, sore boobs and weirdly smelling things incredibly???? I'm terrified I'll get a BFN again. And I feel like I'm having it all in my head and waiting for nothing. TTC is probably the most stressful thing in my life.