has anyone experienced this??

On 11 DPO i took 2 first respond test (the 6 day early ones) and both came back VERY positive. On 14 DPO i took 2 more of the same test, came back very positive. On 15 DPO took 2 more plus a digital.. positive. Then i took 2 more of the clear blue and POSITIVE. although i’ve also been taking the cheap test from me job ( i work at OBGYN) every day since 16 DPO and those keep coming back negative. So that’s where i’m confused, idk if it’s to early or not but i don’t understand why the expensive test are positive while the cheap ones are negative, plus one other thing that concerns me is that i was bleeding for the past 2 days pretty heavily, felt just like a period but only lasted for about 2 days. I saw Dr and they couldn’t really do anything since their test was negative, the RN did tell me that if i am having a miscarriage i would be cramping and i would see a small sack come out, i’m not cramping at all and have only seen blood and blood tissue/clots come out, just like a period. Another thing to mention is i haven’t missed my period yet until today so maybe i could re test with the cheap test but i’m just worried. there’s 3 options

1. heavy implementation bleeding

2. miscarriage

3.it’s my period and i just had 9 false positive test?

Idk i just wanna know if anyone has gone thru this or what u think? maybe i’m too early? i’m 4 weeks 4 days.