thank you for your query.
Yes, I think you need to see a doctor and go the hospital.
It sounds like you had a sudden episode of hypoglycemia
However, this early in pregnancy
you need to consult a doctor to ensure your well being and the safety of the fetus.
Please get your blood pressure checked.
Get your blood sugars and thyroid levels assessed.
Also, make sure that you do not have a cardiac lesion, as you faced breathlessness and palpitations also.
rule out anemia.
Ensure that you eat well, wisely and throughout the day, at regular intervals.