first morning urine is the best sample to test with. pee in a cup and follow the timings exactly with a stopwatch! midstream is harder to get exactly right! also, only look at the colour at the 3 minute point, no earlier and no later!
If I were you I would call your doctor for a blood HCG test, just to be safe. First Response lines are suppose to get darker when HCG gets higher. I too had this with my m/c in early July.I tested daily and noticed my lines getting lighter, called my doctor and had HCG taken a few times and I was infact m/c. Sorry this isn't to scare you but it may be something to be concerned about so it is best to get it checked out. With this pregnancy, my lines got darker every day and so far so good. Good luck to you. I hope everything works out. Big hugs!
They're all positive, so that's a plus.
I noticed that you're three weeks and three days pregnant at the mo. When is/was your period due?
Are you holding your pee in before taking the tests and not drinking and eating lots?
I would definitely try and get it confirmed with bloods if it's upsetting you this much. Stress is only going to make you feel worse.
xx
I hope you can get an appointment sooner rather than later!