Help shortness of breath


okay so pre-pregnancy I was already a little overweight... but I haven't gained anything I actually lost 5 pounds... but I can barely breathe doing anything... if I go grocery shopping can't breathe, if I have sex I can't breathe, sometimes just driving in my car and I feel like I can't breathe... of course I'm going to ask my doctor if there's anything he can do with an inhaler Maybe was there anything else I can do to help my shortness of breath should I walk more?