Does anyone else feel isolated now that you are pregnant?

Keeping the baby a secret till the suggested 12-13 week mark is so hard. I feel like I can't do anything with friends since I'm not able to tell them. It's also hard because I do weekly girl's dinners that usually mean wine with dinner and now I have to worry about making excuses to not reveal my pregnancy.  Just been feeling down the past week when I know this should be a super happy time.