I'm so sorry!! I know the heartbreak you're feeling. :(
I'm doing my FET right now and can only tell you what I've experienced.
We decided to jump right back in, so once AF started I had to have another saline sonogram because of our loss. I was put on birth control from CD5-CD21 (today), 10 units of Lupron started on CD15 for 2 weeks, now I have to wait for AF again and then I'll go in for a suppression check and then will either continue lupron until I'm where they want me or begin hormone replacement therapy (estrace & progesterone) for 21 days, thaw of our embies & transfer is scheduled on day 22.
As for appointments/monitoring, I will have 3 appointments total, the saline sono, suppression check, & transfer. It's A LOT less stressful.