Your feelings matter. Feeling stressed, afraid, furious, or anything else is okay. You don't want your emotions to take over. Even though your instincts tell you to explode now and deal with the fallout afterwards, try to stay cool.
It's unlikely that screaming and swearing will help. Giving yourself time to calm down before talking to someone will help you think clearly. You can say everything you wished. Just say it more professionally.
Worrying about the future is normal. You shouldn't stress yourself out by thinking about all the ways things could go wrong. You don't want to imagine every shame this world could bring.
Stay calm by living in the present rather than worrying about the future. You can't prepare since you can't foretell your future. Everything could work out fine, so don't worry. You must wait and see.
You seem to think every little issue is the worst. However, you have endured worse. This week, keep cool because your problem may pass.
This issue may not be as bad as you think. Regardless, you are far stronger than you realize. Give yourself more credit. You will survive. You'll get there, even if you break down. The end will be fine.
You constantly worry about the worst, but keep cool this week. You should strive to see the bright side even when it's challenging. Try being more hopeful about change.
Most things don't go as bad as you think. Afterward, you usually say, that wasn't that bad. Remember your strength in every situation. You will overcome this and be OK.