Late period, negative test

Pa

Hey ladies! Looking for support and advice. My cycles have ranged from 24- 28 days since I got my cycle back from baby #1. I also always have spotting a few days before starting too. Today I am on cycle day 31 have had no spotting but Ive been taking the cheapie strip tests with nothing. My husband was gone right after my fertile window so its been 2 weeks since our last baby dance that could have been the one to work. What would you do? Get some first response test or just wait it out. Also if I do end up getting my period should I see my doctor about these weird cycles?