Low pulse ox, what do I do? 92 93

Hi,
I've been having shortness of breath and heart palpitations.  My shortness of breath was brought up at my doctors and he listened to my chest and said I was find.  I told him my pulse ox machine was reading 94 and he said that was fine.  Today after any acctivity at all I'm huffing and puffing.  Sitting here I want to take a big drag of air in but don't.  Checked my pulse ox and it is even worse, 91 92 93    I'm very tired, throw an extra beat about every 4 to 6 beats.  Very dizzy too.  I've just been diagnosed with T2 but am not on medication yet.  Is this pulse ox with the trouble breathing something to be concerned about?