My partner is 2 days late (36 days on a 34 day cycle) and did a Crystal Clear HPT last night and within 3 minutes we were fairly sure the test was negative - we could only see 1 solid blue line. We came back to it 7 mins later and we are fairly sure that there was only 1 solid blue line at that time and nothing else.
I looked at it randomly after that again in the evening and am also fairly sure that I couldn't see anything else.
Now this morning I looked at it again and I can see a very very very faint blue line where the positive is. I am fairly sure that it wasn't there yesterday evening.
How should I read this?