TTC #4 while breastfeeding #3!

[Zarababy1]

So I guess this is our first official month TTC our 4th baby! I'm breastfeeding our 3rd who is fed on demand (a lot) day and night, I've had a few cycles now ranging from 5-6 weeks long at the moment I'm on CD 26 with no idea if I've ovulated or not yet! All I know is I took a pregnancy test yesterday and it was BFN! I'm a little lost as I have no idea about TTC whilst breastfeeding and I'm not wanting to wean to get pregnant! We said we would just "see what happens" but I really can't I need to be more in control! I might start charting on the next cycle!