Just need a lil advice.. am I crazy?

Ok so I took an opk on 9/23 and got a peak reading so we dtd we also dtd on the 18th. I’m having some nausea and a stronger sense of smell than usual af is due the 18th but I just feel pregnant like pressure in my pelvic area nausea things like that.. but when I test I get a bfn.. am I testing too soon? Or am I imagining the symptoms ? 3 of my tests turned pos after the time limit. But the ones before that stayed negative. I also have stretchy discharge that’s kind of heavy which is unusual. I would talk to my hubby about this but it’d just stress him out. Advice please ? Thanks for reading