Physiological affects of Flying...

[flapsforty]

sharp pains during my day-to-day activities

Sharp pains during day to day activities are not normal.
Even less so for a healthy 19 year old.

First thing you need to do is to check with your mother and with a medical professional. A dietitian and a mental health professional might be worth talking to as well.
Things you need to find out:

• Is everything as it should between your mouth and your anus?
• Do you eat and drink properly?
• Do you exercise regularly?
• Are you of a nervous disposition and does this affect your bodily functions?

I repeat, regularly suffering from sharp pains during your day to day activities is NOT normal. Being a flight attendant is physically and emotionally hard work. You work very long hours, you can not escape your pax for a quick breather, and you need to be 'fit for flight' at all times when on duty.
.. imagine having to open a heavy aircraft door in an evacuation, you are suffering sharp pains just then and have to wait until they pass... wouldn't work would it? ...

Being an FA requires robust good health, and at your age, unless you suffer from a medical condition, there is no reason why you should not enjoy that.

Stop worrying about the petty stuff, deal with the serious stuff instead and get your bowel problems sorted!

Good luck.