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33 day cycle. Negative preg test. Positive OPK in 20 seconds. Not sure

G • Mon, Oct 21

So , I’ve done 2 negative pregnancy tests. This is my current cycle and I’m on day 33. I had 2 days of light pink spotting at cycle day 26 and 27. Since then I have done 2 tests, both negative. I still haven’t come on my period. Tonight I decided to do a opk test and within literally 20 seconds I had the darkest result I’ve ever had.

Any thoughts? Am I having a surge? Am I pregnant? I’m so confused