Sorry about your loss. I know how heart breaking this is :-)
It's a personal choice, but in my opinion I would wait 2-3 cycles. This gives u time to heal physically and emotionally too. The emotional part may take longer, but each woman heals in her own time.
It's your choice and do whatever makes you happy.
Takecare
Rachel x
Doctors say wait until after your first period. I had sex the first dai I stoped bleeding not intendimg on getting pregnant again and im not 19 weeks 2 days with a littlegirl