Jealousy of others being preg.

Its been about 3 months since i lost my child. And i just found iut the a close friend of mine and his gf are pregnant. After i found out i was just outraged w/ jealousy. I am happy for them just so jealous that she is 3 months pregnant and happy to become a soon to be mommy and im just here grieving over my baby that i lost. Is it normal to feel jealous about another being pregnant? I just want to cry so much.