@northernlass81
Hi there and welcome to the club- I'm so sorry that you find yourself on here 
I was in the same place as you last summer- in fact the "anniversary" of that dreadful dating scan has just gone by for me and I have found it very tough.
At the time I was 12+6 and it's so true that all your dreams & plans get shattered all in one go. I had medical management too- negative PT after 3 weeks or so.
My then 2 year old will be 3.5 in a few months time and I am a year older (yikes!).
We didn't wait for first AF, just got on with TTC once bleeding stopped/negative PT.
We're now coming up to 1 year of TTC and I won't lie, it's been a very painful journey mainly due to no whiff of a pregnancy since we started last July.
I had never been on the conception/fertility threads before until my MMC happened.
This thread has been amazing for venting my anger & frustration and feeling like I can let it all out here!
Anyhow, take things easy and go with how you feel- there are no rules re when you should TTC again.
I hope you don't have to spend too long on here!