If you think you'll be a miserable crank, stay home send a lil gift. If you can find at least ONE person to sit next to and commiserate about how fat the mtb got, go.
( that is what I'd do, but I am a mean one)
Now.....about the TTC thing....you gotta just get past it, people are gonna keep getting pg before you, it is just gonna happen. I was on shots and in my upteenth round of meds and iuis while planning my sister's shower for the first grandbaby in all the families. Pure Hell, but I got through it, only to find myself pregnant when my niece was 3 months old.
Good Luck either way.