3 days late and still BFN

Carrie • I`m 34 have 2 babes one is 21 months and the other is 2 months !
Hi ladies looking for some insight to why I'm late and still getting BFN
DH and I have been trying for a few months and I took my 2 round of clomid cycle days 5-9 
AF came June 30 I O'd 14/15 of July hubby and I BD every fertile day plus O day and day after.
​AF this cycle was due 27/28 I have been having bad back aches and mild cramping for 2 weeks, unual stuffy nose and sore throat, very tired, weird nipple tingling feeling and breasts are sore but more on the sides then the whole thing. I did a round of acupuncture this cycle as well to boost my chances.  I'm going crazy and broke taking hpt hoping for the BFP! Ladies have you experienced this at all? Please help! 
​Thank you