HELP! Second test line lighter????

Question

Ok so yesterday afternoon I tested and got a very clear positive with a FRER test within 30 seconds. I just tested again with FMU expecting the positive line to be darker and it's actually fainter. I already have a doctor's appointment scheduled for Tuesday but has this happened to anyone else?? Is this a bad sign?? AF is a day late and I am 15 DPO. Shouldn't the tests be getting a stronger positive day by day? I'm worried now. :/

Answer

Any news Madelyn? I had vfl last night and thoughts id retest with fmu to ease my mind and they are still vfl but maybe even lighter than last night, trying not to freak out yet but i have a history of MC 😕

Answer

Also, I used stream urine instead of testing in a cup both times. Would this affect anything as far as how dark the positive line is? 
​Thanks for your input ladies!!

Answer

Don't panic, could be nothing, here is a possible explanation I learnt this week: I'm further along than you but I still test every couple of days on my cheapy Amazon tests (peace of mind/craziness), well, I learnt that v high levels of hcg can actually give a fainter line! Test might not be able to handle it. Do another test but add WATER to your test cup. This will dilute your urine and you should then see a stronger line.

HELP! Second test line lighter????

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