Butterfly/anxious feeling my my chest/throat but i don't feel nervous or anxious- no other symptoms other than i feel need to deep breathe. what is thi?

Possible anxiety : This can be anxiety or panic attacks. Try to do deep breathing exercises, meditation, regular exercises, talk to aomebody close to you if you notice it coming on , this can help calm you down. If these fail, you may need to take oral medication that can help as needed or even daily meds to prevent subsequent attacks talk to your dr about this. Good luck.

Anxiety vs arrthymia: If it quacks like a duck... Its likely anxiety. Many people have trouble labeling their emotions and can have limited symptom panic attacks with just one or 2 symptoms of anxiety. Alternatively, you could be having some irregular heart beats which can produce this sx. Check with your primary care md.