Ovulation Strip Reading

Br

Today I hit the first five day fertile window. I’ve taken ovulation tests all week. Today was no higher than previous days. Is that normal? I was under the assumption it would at least have a slight increase as ovulation was heading to its peak. I took the test twice today just to see. It was higher by .03 first thing this morning opposed to about 10 minutes ago.

Is there normally an increase now or not quite yet? This is my first time ever using them if you can’t tell lol.