Not sure what to think.

After my son was born in October 2017 my period started basically right away. My cycle has been 30-32 days ever since, with the exception of a month that I skipped early on and a super short cycle (18 days) a few months back.

Hubs and I aren't trying (yet) but we aren't making any huge efforts to prevent pregnancy either.

I'm currently on CD 40 and he keeps telling me I should take a pregnancy test. I'm hesitant for a couple of reasons... Mainly, I don't feel pregnant lol with my son I was nauseous before I even knew I was pregnant, my abs felt like I had done a million sit ups and my boobs were super sore. I'm not feeling any of this. The only 'symptom' is that I'm exhausted (going to bed at 8pm most nights because I'm so tired). I also know that, if I let myself believe it's possible and take a test, I'll be heart broken if it's negative.

So my question is... How long should I wait