TTC please help

I’m 11 DPO and I keep getting BFN we are both healthy and he and I are in shape (him more than me as he is in the military) I’m having tender breast, cramps he is 22 and I’m 20 we have been trying for 3+ months and we use ovulation sticks, my cervix is soft and high up but still BFN on tests any advice please baby dust to all