Am i exaggerating?

Hello, i feel like something wrong with my body but i feel like i may be exaggerating at the same time. So I'm turning here for some help! Age: 21 Height :158 cm Weight: 57 kg Don't smoke/drink Female

Past and current medical conditions: i had and still have a problem with my Ferritin level. First time i took test(2023) it had 3, i started eating iron supplements, the second time i had the test it had 19,30. I didn't go back to the doctor and stopped eating the supplements because i felt better. I started feeling weak recently and all so i starting eating the supplements again and yeah I'm starting to feel better again. Also i had a little anemia but it's not that serious.

My current symptoms that i kind of don't get is that i feel like the air I'm breathing is not enough (not air hunger). It's like i have enough air and can inhale and exhale deeply but still the oxygen feels like it's not enough. I didn't notice this problem actually until my parents scolded me to stop sighing while eating. They scolded me multiple times and i couldn't help but sight and inhale as much as i can to not feel the tightness in my chest. Because it makes it hard for me to eat and breath at the same time. It's like there is something stuck in throat but when i drink water it goes smoothly as if i was imagining things. The feeling is obvious the most when I'm eating. Sometimes I'm laying down then suddenly feel the tightness. It happens in random times no specific time. Also when the this whole thing start i notice that my heart beats reaaally fast.

I don't know if i was able to explain the symptoms clearly but more or less that's it.