33 weeks pregnant. Do you think i develop an asthma?

I Am 33wks pregnant, few days ago til now i had this bad cough that attack suddenly. Everyday, i have to climb stairs for four times and a always short of breath. As soon as i reach the second floor at my working place, i will breath heavily, short but fast. So i suspect i develop asthma. Should i concern about this and tell my doctor? What will be the effect to my baby?

nope. sounds like you are 33 weeks pregnant. lol. im sure you are fine but always take any concern to your doctor, thats what you are paying him for.
but this time the baby is still high and taking up a ton of your personal space. take it easier, slower. in a few weeks he should drop and you will breath easier. course then you have a whole new bout of problems like lower back pain and center of gravity.
but for now its time to slow down a bit. you have alot going on just cant keep going at quite the same pace.

Do you also have heartburn? I had heartburn and asthma-like symtoms. My Dr. gave me an inhaler, but also put me on Nexium for the heartburn, and she said that heartburn and wheezing was related. And sure enough, once I got the heartburn under control, my breathing went back to normal. (my baby is now 18 months, and I still have that inhaler, hardly needed it after the nexium!)

it wasn't the baby making me out of breath, it felt like my lungs were struggling to open and I felt they were constricted. I had asmtha as a kid and it felt like that.

I ended up in the hospital for four days while I was pregnant with #1. My childhood asthma (that had been gone since I was five) acted up.

My blood oxygen level was really low when I first went into the ER. If I hadn't gone, he (his oxygen was, of course, also low) could have died, or at the least been severely brain damaged.

I'd call your doctor so they can check your blood oxygen.

always talk to your doctor if you have concerns, but as your baby grows he squishes up to your lungs and makes it harder to take good deep breaths sometimes i felt like i was drowning, but dont worry your body wont suffocate itself, just take a break when you feel short of breath

Definitely tell your doctor about it, but it is more likely that your baby is just so big at this point and hasn't dropped yet so is pushing on your diaphragm making it more difficult to take a deep breath. Once your baby drops, you should be breathing easier.