Imagining symptoms

Hi everyone, so I just got married well almost 1 month ago now and we started TTC (having unprotected sex) a couple of days before the wedding. I came off the pill in January and periods the last 2 months have been around 28-32 days however before that I did have a 72 day gap! Other than that all were around the 28-32 days mark. Came back from honeymoon and AF was due Sunday she didn't arrive and Tuesday I got a BFN 😔 did I test too early? Im now on cycle day 37 and still no AF scared to test again as I really want it to be positive........ I've been feeling cramps and nausea almost been sick a couple of times. Just have a really strong feeling I'm pregnant, generally feel not quite right lol!