if the symptom is new, it's panic attack, which could be transient. Try to relax yourself.

Teddy, if our mind is stressed, it can affect our body too, may make us become very tired, having headache, chest pain, and etc.

If cardiologist and neurologist have rule out all those symptom is not organic (not related to organ), then it could be mental.

However, "I just feel like I lost control of myself and getting crazy" and the 1-2 month period of symptom quite fit diagnostic of panic disorder. Just my 2cents here.