Plus-size Testing for a BFP potential

Pa

I am plus size (size 24/26) and am wondering if this impacts how soon to test. I would like to use a test that claims to test “5 days before your missed period”... but should I wait?

Also, my cycle is usually 25-28 days. I used clearblue OPK and from that showing peak fertility, i ovulated late— around day 17 — 4 days after my original glow prediction. So NOW, after logging that, my flow prediction for my period moved to 32 days which is a really long cycle for me — highest ever is 31 days.

So I don’t know where to count the 5 days back from now ....

Of course my husband and I are leaving for a Hawaii vacation and period was due on 1st day of vaycay but is now technically due on the last day now

🤷‍♀️⏳