You're right. I did not read your question correctly. So, as you inhale, the breath is short and shallow and rapid and successive?
I have a feeling that it might be related to anxiety. You might try to practice deep breathing, where you use the diaphragm to push air out, exhaling until you can't exhale any more ... and then exhale for 3 MORE counts...and then fill up with air from the pelvic floor to the abdomen to the chest to the shoulder. try this 5 times straight multiple times a day. Or, if the symptoms continue, I'd suggest that you get yourself on tape so that you can show a doctor...they want to understand symptoms so it's really great if you can present the hard evidence. I'd first see a family doctor and then ask for a referral to a pulmonologist, if necessary.