Seeing Preg family during holidays

My brother-in-law's gf is pregnant. We miscarried in January and are still dealing with it. We are currently TTC. I have not seen her since she announced her pregnancy and I'm not looking forward to it. They were not even trying and she's pregnant. Meanwhile, I've been trying since our miscarriage and not successful. I'm scared I'll show my hurt/disappointment/pain on my face and make Thanksgiving awkward.