get through a baby shower after loss

I work with about 500 woman, no exaggeration. The majority between 22-40, so lots of BFP's. It's always a joke their are 3 preggers at one time in the office. I was one of three....the other two are due a week before and a week after I was. I am truly very happy for them, but I won't like, it stings a bit.
Today I have a baby shower, and I am so very happy for this couple, but seeing all this baby stuff has made me feel worse all over again. It doesn't help that I'm still testing BFP nearly 4 weeks after the fact.
I don't want to be a jealous person, it's such a horrible feeling. But I can't help it, I'm jealous of everyone with a healthy happy baby, a round tummy, etc.
I don't know if you just notice it more after a loss but last night I went grocery shopping, and I ALWAYS go at night to avoid a billion people, and I swear it was pregnant shopping night!