Congratulations on your pregnancy. I hope it is a happy & healthy one. By all means go and shout it out to the world. Most women only wait til 12 weeks and you are well past that.

Try to ignore everyone's opinions. Some people will keep them to themselves, others will not be able to hold them back. Most people these days are not bothered about people having babies before marriage so don't worry about that. Expect some criticism about the living situation though. Your family will be worried that this will put your house plans on hold so make sure you get some firm plans in action as soon as you can. Best of luck with everything.