Hey farthingwood, I found myself in a very similar situation 4 years ago when my sister starting having babies.
I too was about to start a 2 year PGCE course, followed by my NQT year and was desperate to have a baby.
I have just finished my second year of teaching and due in October, and with hindsight am soooo glad I waited.
Being a student teacher and an NQT is hard- physically and emotionally draining. I also started- as many people do due to schools not being sure of future finances, on a one year contract, so had no stability with regard to maternity leave/ pay. Second year, with a permanent contract, I started to feel like I knew what I was doing and was able to cope with early pregnancy and teaching simultaneously.
I will be starting my third year, having moved up the payscale twice, with a responsibility, so know that we will be financially secure. (Which is the biggest weight off my mind). I also know that going back after ML will be easier, having spent time developing my teaching.
It's hard, but patience now will make your first pregnancy so much less stressful and you can think about timing it around the summer holidays to maximise time with your new baby.
Do you have any nieces/ nephews to keep you busy in the meantime? (All the joy without any of the hassle!!)
One more thing- the average age for women to have their first child is now over 30. Think 31 or 32? So we will likely be a good few years older than our moms were when they had us.
xx