Morning ladies. After all my positivity I've woken up feeling a bit rubbish

I just don't know why it's not happening and whether it ever will

I ov fine, we hit ov every month with a few chances at the right time, I'm not overweight or ill , my Lp is fine, I've been pregnant before, I'm still young(ish) so I don't get what's missing?
I think I just expected to get pregnant quickly every time.
My mum always said she got pregnant whenever she wanted immediately with no problem, never had a miscarriage, and my sister seems the same, so I expected it to be easy for me too but it's just not
I got pregnant with my dd in 3 cycles and to me that's reasonable , I think we messed up the timing on one of the cycles anyway, with my last pregnancy it took 5 and I'm now on my 4th cycle (including the post mc one) for this time so it looks like we're heading the same way. What are we doing wrong?? Why isn't it happening??
When I saw threads on here for women wanting their bfp before their due date I used to think 'yeah obviously I'll be well pregnant by my due date' but now it seems a real possibility we'll still be trying by then . My sis has a baby due 13th December, they should've been 5 weeks apart. At this rate I could easily not be pregnant by the time her baby has been born and that is really hard.
I've been really strong this month but it's a constant battle not to just crack up

I'm heading towards a 3 yr age gap with my dd now which wasn't this plan but what if it's more like 4, 5 or more?? It's the old old story, everyone else seems to pop then out at the drop of a hat! The problem is expectation , I always thought I was one of those people so it's really hard that I'm not.
Sorry to rant.