HELP PLEASE!!!!

So two days ago in the afternoon I decided to take a test and it came out positive. I waited until this morning to test. It was not first morning and it was only maybe an inch in my cup of urine but I submerged the tip of the test. These are the tests side by side. Top was two days ago and bottom is today. Last night I felt some cramping so I’m worried it’s a miscarriage. Anyone have a successful pregnancy with tests looking like this two days apart?