One step pregnancy test. Are they shit?

Question

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Im going crazy with the one step pregnancy tests, I know they are cheap but they worked great with my first pregnancy and with my miscarriage. I could clearly see the progression of the hcg and the lack of it. But this time round I dont know what is going on. Are they faulty? Has any one gone through an experience like this with this tests? 
I have been getting very faint lines for 3-4 days. Yesterday I even got a nearly negative with FMU and a stronger positive with middle of the day urine. Im so angry, because is making me so upset thinking im going to miscarry.
The picture below is this morning with FMU. Two days ago I found out I was pregnant with another clearblue with a fainter line and then I double checked with a digital. And with this test I can see that hcg is increassing. But with the one step you wouldn’t think so... Any experience with this? Thanks!

Also, the one step are supposed to be 10ml  sensitive while the clearblue is 25 ml!! I don’t understand 🤦🏻‍♀️🤷🏻‍♀️

Answer

My one steps had some super dodgy ones in but overall considering I bought 150 and used them all 🧐 I think you’re bound to have a couple of dodgy ones 😂

Id use step one again but I’d personally go by the clear blue though hun!!

Answer

I just got a different brand, second morning urine. Definitely something went wrong with the one step! Keep it in mind lady’s!!

Answer

I tried posting this but didnt go through

. You can see the difference here with the clearblue.