Extremely emotional!

Melissa • I`ve had 3 preg I lost the first then had my rainbow baby then I lost my son this year trying for baby 4(1 living child)
I found out I was preg last week and have been emotional cuz I'm starting to get sick (non pregnant sick) super stressed about family problems and now school... On top of that in terrified this pregnancy will end in misscarrage(I lost my son @17weeks in feb of this year).... I'm worried all these crazy emotions will cause a misscarrage... Dies anyone have advise for dealing with stress?