2 positive pregnancy test digi's PM, 1 positive digi am 1 negative am at same time but diff brands ....?

Ok, so Yesteray I was so excited , I finally got my BFP !! I'm pregnant.. It took us almost 20 months .. So in ttc I had tons of left over pregnancy tests .. To confirm the positive, I took a first response gold digital, it came up positive but it took FOREVER , I took a first response early result test and it was faint but positive , I took a blue dye EPT instantly positive , I took a clear blue digital, pregnant result .. So I wanted to take more so I could take fresh pictures for a keep sake book the next morning, today ... I took 1 EPT ,2 FRER ( one was defective ) 1 clear blue digital and one first response gold digital, again I know I am pregnant, I was just taking them to get fresh pics for the memory/keep sake book . So All of them came up positive right away, including the clearblue digital ... Except for the two first response tests .. The first regular first response did not work .. like the control line was super light and nothing but a thick white line showed up in the test area.. So I took the other one from that pack and it showed up positive right away but still super faint, lighter then the night before ... Also the first response digital came up negative this morning as well.. it was positive last night .. Still like I said, the clear blue digi,ept and regular FRER was positive right away as well as an internet cheepie was positive as well . I am just concerned that thw first response digi came up negative... So... I have like 100 tests ( I bought them in bulk ) I waited 4 hours and re took them this afternoon .. ( I know I am crazy and once again I was only taking them to get clean new pics that had not turned yellow yet ) The clear blue digital came up positive within 20 seconds, the EPT came up positive instantly , still light but you don't need to squint to see it, I also took another first response early result regular test, it came up instantly positive, slightly darker then it was this morning.. but the FRER gold digital still came up negative ? Why would this be ? if it came up positive yesterday afternoon ? but the two of that brand were negative today when I took them.. Again ALL other tests I took from 5 other brands were positive before the time limit was over .... Do I need to worry or do you think that maybe my pee was more concentrated yestersay afternoon and that the first response digital is maybe less sensitive then the clear blue digital ? I know I sound obsessive.. but I am just a little worried.. because it took us so long .. I'm not having any pains, no bleeding.. just a tiny amount of super light brown dishcharge once when I wiped .. I am only 12 or 14 DPO , so it could still be implantation bleeding ... but am I ok ? What do you guys think about the test situation ? Thanks !!!