I had my first two when I was really young and got pregnant first month of TTC with my first, which really helped as I would have stressed if it had taken a long time.
Then my second was conceived the 2nd month of trying.
Then I split with their dad and wasn't in a proper relationship for years, but then I started seeing someone and although we weren't trying, we weren't preventing either, and I did start to worry I wasn't very fertile any more as I was with him for a year and nothing happened and it was over 8 yrs since I had my last baby (though 5/6 years since I had a very early m/c)
Well that relationship ended in July and in late September I started seeing someone new (casual though, not in a proper relationship). We had sex just once in October and I ended up getting pregnant by him.
I think it happens when it's supposed to happen & the best thing to do is relax and not think about it too much, just have fun trying lol