Hi, I can empathise 100%. I've just written myself off an antenatel list as had same op today (sac 8+ weeks,fetus small no heartbeat). Like you I already have a child, a dd. Before I say anything else I think your BIL was right to apologise to you so don't feel guilty, maybe he just didn't think before he spoke, which was really insensitive of him! Likewise I would threaten physical violence if I had been put in the same position anytime today (or quite possibly for days/weeks to come!).
My background - I came on here as can't sleep and feel very alone. I had scan at 8.50am today, had op around 7pm. I've had mild pains, faint bleeding for weeks - before I knew I was pregnant - I've known I was pregnant for a very excited week, but there were signs on scan today of molar pregnancy). The hospital staff were lovely, and my dh,mum and MIL have tried to say say helpful things, but nothing will actually help at mo. Pregnancy was a great surprise, due to very irregular periods, and had just sunk in and I'd already mentally planned ahead, i.e. knew dd would be around 3.2ish at time (my morning sickness, boobs etc. unfortunately still telling me I'm 8weeks). dh had started to take it all in, so I was hopingall would be fine.
On a positive, the process itself was quick (under general for about 15min), not much discomfort, I didn't see anything that made me feel really bad (well worse), and it was necessary. Psychologically I'm f**ked, trying to be 'normal': but have people to talk to (some I'm sure will say it wasn't a 'real' baby, but I know it was) and will read loads on MN.
I really wanted the baby. I'm 31 and wanted to try 18months ago, but dh said no. I thought I was pregnant in april, wasn't, it put strain on marriage. Now was pregnant and ca'nt believe ended. Pretty much all my friends are having or pregnant with dc 2.
I'm sorry you are going through this too, but thank you for sharing your experiences as all the threads here have helped me too. Very best wishes for tomorrow, take care, I hope you get home quickly.