The IVF journey is definately a hard one, and I too go home crying whenever I hear someone else has gotten pregnant. My sister has just announced a second pregnancy (not planned). I feel like a monster, Ivf has not brought out the best in me. It's not that your not happy for them I think it just brings to the surface such hurtful emotions.
Good luck with your journey and i hope Bubhub is a great support for you.