Am I worrying for no reason 🙁

So I had my bloods done on Saturday and they came back at 37. I keep taking tests to make sure the line is still there and it's getting darker as the days go on. I miscarried four weeks ago. So I need to go for my bloods today then again on Thursday. If the line is getting darker on my tests will my bloods be higher. It's also to make sure there's no tissue from my last pregnancy which ended four weeks ago. But I had a blood test a day later which came back negative so I knew I was no longer pregnant also done tests which only showed one line. Surly it can't be from my last one