Are short LH surges normal?

I tested last night at 11:30 pm and had almost positives on strip tests no peak on clearblue. Whenever I get almost positives I always test 2 hours after and it’s positive but obviously I couldn’t test last night at 1:30 am because I was asleep. So this morning at 9:00am I tested and the strips look almost positive still but darker than last night and the clearblue shows peak. So I’m thinking my LH surged during the night and is now going back down as the lines on the strips aren’t as dark as the control line but are very nearly positive.. and clearblue is reading peak. Are short surges like this normal? And does it mean I’ll most likely ovulate today?