Contradicting results

It seems like my lines are not getting darker. These were taken between Friday 4/26 to today 4/29. Has anyone experienced this but was pregnant? I will keep testing. Just discouraged now. (I don’t get periods naturally I ovulate randomly if I do at all and I have had one kid)

I had a period by medication that my doctors has me take every 3 months April 5th. I was not pregnant before the medication, and have never had a positive test expect when I was pregnant with my daughter 5 years ago. Not on birth control.