I think only you know when it's right.
There's definitely loads of pressure (IMO). Although neither DH or I have the type of family to ever mention it - so not that type of pressure - but I guess expectations seem to bear down!
DH has always and children. However when we met ten years ago - he used to joke Id rather cross the street than walk past a child!
I've always wanted a family , but never "now". DH and I are big planners. We planned our wedding around when we could afford it. We wanted a house is a nice area before we even thought about ttc. I'm early 30's and really started to worry about timings. I put all this pressure on myself, but DH just wouldn't be read if we felt we weren't financial/lifestyle stable. It was what was right for us. And I soon realised, I was putting most the pressure on myself, it wasn't really anyone else.
Then all of a sudden, we made our decision to ttc and I couldn't be happier. A lot of people's who DH and I got to together many many years ago married way before us and already have 1,2, or 3(!) kids already!
I am so excited about our decision. I do have days where I think "oh no - am I really ready to be responsible for another person?!" And then I relax again 
I think I'll probably do the same when we get our BFP but that's just me. I'm a big planner, and love to be organised, so the unknown scares me. I would be much more comfortable if I could order a baby with a 9month delivery date (!) as I would feel much more in control....but I guess that's life!
So you will know when you're ready. And your feelings might change overnight!
Good luck!