bubble feeling in lungs

hi please i am 19 yrs old and like 5 days ago i caught a cough i think from cold drinks and then lik three days ago when i breathe in i get a feelin in my lung lik bubble kind of feeling very slightly though. like for example when u have a cough and ur in public and u hold urself from coughin and then u breathe cos of the mucus in ur thoat it gives a bubbly feel. thats exactly how it feels.but in the lungs and am sooooooooooo scared i have no idea what it could be. but sometimes i dont feel anything. whats wrong with me?