Help! Could it be a false negative?

[Sammikins90]

Im really confused by my body and no idea what to do. Help is greatly appreciated and sorry for the long post!
So, we started ttc in August when i came off the depo injection. No AF until 10th of september.
I assumed I ovulated roughly around 10-14 days later. And then about 2 weeks after that i was hoping to test. Kept getting negative. However, I ended up being rushed to hospital due to a cyst on my ovaries. After it was all sorted they sent me for another internal scan to check it was gone. This was the 10th of october. All clear cyst wise... but she said I was around day 14 of my cycle and that I was just ovulating that day!! This confused me as it had been an entire month since my last period and I figured I must just have a very long cycle.
Anyway, since that day was ovulation day I ran home to tell hubby and the magic happened...
I assumed from here I would be due on around 2 weeks later (which was 3 days ago)
However, a week ago, i thought I might have been starting my period, because i had literally a few spots of blood. But it wasnt my usual colour it was brown!! I waited for AF to come in full swing but nothing else happened after those few spots. I then got really excited thinking this was my implantation bleed and hoped I might be pregnant.
Then a few more days later and my breasts are so sore, worse than when im usually due on, infact theyve grown ridiculously in size. Usually when AF is due they hurt a lot, but its never like this. im ridiculously moody and have been for a few days.
I then got excited when sunday came, 14dpo, when I assumed I must be due on!
No AF came and still no AF today which is 17dpo. Usually a good sign.
Yet all pregnancy tests I do are negative. Even the early detection ones, clear blue. the lot. All negative.
So its been since september 10th since AF. Apparently I ovulated on October 10th according to the scan. Is 17dpo the right time to say its definitely a negative or could it still be too early.
What if my cycle is so messed up I dont come on for ages. realistically, how long should I leave it before i give up hoping its still too early to detect?
Will I even ovulate without a period?? So many questions and I feel like Im stuck in limbo.
Any advice please?

 

[GeekMaker]

I wouldn't rule out pregnancy only because I have known of people personally who didn't show up positive on anything, even blood tests for like 2-3 months after conception. That being said, this is my first time TTC and I don't have much knowledge that others may have and they will probably share with you. Hope you are pregnant!

 

[Sammikins90]

Thank you, im now 19dpo and still showing negative. Still no period though. Officially what I believe to be 6 days late.

Im starting to think that my cycle is just so screwed up from the depo injection and I was just lucky enough to have a period that one time.

My breasts are still extremely large and sore. I should be due on sometime soon surely. I physically cannot track a cycle at all. All i can do is use opks and hope for the best until my cycle corrects itself. And just tell myself im not pregnant and just test once a week to make sure. Because this hope is killing me.

Im officially giving in thinking I am because it is doing me no good to think I might still be.

We are quite active in the bedroom so regular sex and a fortune on opks it will have to be for now until my cycle corrects itself. I wish it were better circumstances and i wish someone told me how bad the depo was for ttc when i went on it!!