see if your GYN can do a laporoscopy to "clean out" the lesions and adhesions from the endo before you go in for your ivf if you can. But I know of many women w/ severe endo that have been able to carry healthy babys to term. Good luck and you'll be in my prayers!!
you still have very high chances of having children. the doctors told my grandmother that she couldnt carry her son with severe endo but she did just fine and was able to have another. good luck