Yep - been there done that. We also took awhile to fall preganant about 16 mths. We waited for the first scan to see the heart beat which was at about 9 weeks. (I had to pay for it but asked for a scan for dating)

There is an article posted here somewhere that showed the chance of miscarriage after the heartbeat and it was very low something like less than 2%. So we waited for the scan and then let everyone know. I've had other friends wait the full 12 weeks so the risks are even smaller.

Congrats on your pregnancy!!!