Can you get a 2nd mortgage if you have a equity loan? What is a 2nd mortgage??

Your Home Equity Line Of Credit IS a second mortgage. You could get a new second mortgage, that would have to be large enough to pay off the existing second. If you were able to find a lender willing to loan you additional money on your home without paying off the old second, then the new loan would be a 3rd mortgage, that would carry a MUCH higher rate that a second, due to the added risk of being in third lien position.