I'm not sure if i have asthma. what does it feel like?

Variable symptoms.: Classically asthma patients complain of chest tightness, like someone is sitting on their chest. It can feel like you are not "getting air to the bottom of you lungs" or I have even heard that their chest feels "itchy". I will occasionally have non-asthmatics breathe in and out of a coffee stirrer and then have them do jumping jacks, to simulate trying to breathe through a constricted airway.

Lack of air: People with asthma symptoms typically feel some version of a "lack of air". This can include feeling chest tightness, like something wrapped around your chest; chest pressure, like someone sitting on your chest; wheezing, like a squeak or whistle noise from your chest, or generally "shortness-of-breath" where you feel out of breath like you just exercised (when you did not).

Acute...: Asthma is a disease characterized by acute episodes of bronchospasm and airway inflammation. Most asthmatics experience shortness of breath, coughing, wheezing during an acute episode but can be symptom-free between episodes. If you think you are having an asthma episode, see a doctor for evaluation to confirm the disease. There are effective treatments.