Cycle length/ovulation question

Hi ladies.

Glow has my next period starting Sunday. Today is cycle day 26 but you'll notice from the pic of previous cycles that my average is 27-30. My question is.. I got a positive opk last Friday so if I am 7dpo today, does that mean it could be another 7 days before I can expect my period? I took Clomid this cycle and I heard it can delay ovulation which it did, now I'm wondering if a late period because of that is inevitable. When is the earliest I could take hpt? I'm trying not to get my hopes too high.