Help! 24 and been TTC for 2 years..

[Bubbly2279]

Hi.. Myself and my partner have been trying for almost 2 years, he is 33 and has a child from a previous relationship.
I have been back and too from my GP's, who have told me everything is fine, I was on the pill before we started trying, and my periods came back pretty much straight away.
I always get one monthly, however they are not regular! One month it will start at 26 days and the next one could be 40 days!
I always have brown discharge up to 4-5 days before my period, and a couple of days after!
Last month I thought I was pregnant as I had what looked like implantation bleeding on day 23 of my cycle, and I have never been as early with my cycle like that before, but then a coupe of days later my period kicked in again. Now I'm on day 10 of my cycle and I had some red/pink blood on the paper after going to the toilet and then nothing.
I've red up and it says it could be ovulation bleeding but I have never experienced this before and I took an ovulation test and it came back negative. I'm so confused.. I haven't got sore boobs or anything like that, I have been feeling really run down and can't get rid of a cold, and also been feeling a little sick. But nothing major!
Please help!!

Have you tried OPKs or temping to see if you're actually ovulating?

As above, I would recommend using opks and temping to check your ovulation. Opks need to be used usually from around day 8 of your cycle in order to get a positive as they go positive before you actually ovulate. You could have ovulation bleeding but this means you have already released an egg.
My cycles sound similar to yours. Varying lengths, brown spotting several days before hand. My last period I randomly spotted three days before, then nothing, then suddenly my period arrived. I temp so I had a rough idea when it was due, but I still haven't sussed out my luteal phase as it seems to vary and apparently it shouldn't