What Causes Severe Pain In The Ribcage?

hello...abt a yr ago i was exercising and had a bad pain on my right side on my ribcage. i felt a lump and went to multiple dr's and none of them sent me for tests because i didnt have insurance at the time. it got so bad one night i went to the er and they said it was my gallbladder and did emergency surgery. the pain never went away and i felt more little pea size lumps cover my ribs and they hurt to the toch or if i strained myself in some way. i am now 37 weeks pregnant and the pain has come back. its abt 3 inches above my bellybutton and to the right. i looked it up online to see waht it could be and there is lists of things. im nervous because i can have my baby anytime and want a safe delivery for me and the baby. what should i do? are there tests they can give me being im this far along?