General chest and abdomen discomfort and more

Hello everyone, I am new to the forum. I am 18 years old female. Before a year I went to a cardiologist for chest discomfort and left with the diagnosis of anxiety. This year these discomforts came and gone but for the past few months I feel "heaviness" in the chest almost everyday. Plus sometimes I have upper abdomen discomfort and for the past few weeks I cough nearly everyday (not much tho) sometimes and with white phlegm. And my nose is blocked most of the time. Sometimes I feel like can not take deep breath or enough air.

I have a doctor's appointment in next week but right now I am so so scared that it might be something very serious and I have to give up my dreams, my life, everything. I am so scared. Any clue what I must expect? Thank you in advance

hello, im an older lady so i get my aches and pains too...but as an 18 year old you should be in great health.  What are you doing that is not good for your body?  think about that first..then worry about the rest....if you know you are then you need to put a stop to that lifestyle first, should you not?

The only bad I do is that I worry too much sometimes. I worry a lot actually