Ladies I’m 7 weeks today and had an early scan last Wednesday and was so happy to see a heartbeat

Only the past few days I’ve been cramping and had one last test in my house so thought I’d take it (as I’ve had 2 chemicals before I’m a real test freak) and all of a sudden my 2 lines are the same darkness where as before the test line has been much darker than the control 😢😢😢 I’m so scared my levels are dropping and I’m about to miscarry please someone give me and insight in this? Top test is just other 2 are from about 2 weeks ago