Pregnant and Stressed

So I am 21 weeks pregnant, and I am obviously showing. I mean, just within the last week, I have practically doubled in size but no weight change. I already am having problems seeing my feet when standing. This is my first pregnancy and I can't believe at 21 weeks there's such outstanding growth. I don't know what I am having yet, been having too many problems with doctor's assistants not knowing what they are talking about.

Is it totally normal to be sooo veryyy emotional when you are pregnant? I mean, the littlest thing can be said about me or my belly or anything and I just bust out in tears. This is tough coming from me. I've never been the sensitive girly type, but now it's like I don't know anything different.

Maybe it's hormones, but lately I have been under so much stress with my husband's family. I am really worried that by me stressing over these so not worth it people could bother the baby and its growth and such. Is there anyone with any known ways to cope with this problem and not just ignoring it because truthfully that's a lot easier said than done.