Chest pains

About 3 days now and I've been having very very bad chest pains very achy 
It is painful especially while laying down or even sitting 
Recently I had a cold with a stuffy nose and it was kind of hard to breathe with it being so stuffy I was thinking maybe that was the reason it being so difficult to breathe 
But no... that has gone away and my breathing is still acting up along with the chest pains 
Called my doctors and she suggested I come in 
Anyone been through this? 
I am almost 36 weeks