I have taken several courses this year regarding alcohol and drug use during pregnancy and the first month is the most important month in terms of development as the brain and spinal column are the first things to form and everything else forms around them. Alcohol can have devestating, cascading, and pervasive effects on the development of a fetus with respect to physical and mental development. Smoking cigarettes also does significant damage. While it's possible to have a "healthy" baby, it's also very possible to have a baby who has mental and physical disabilities, and those diasabilities may not be obvious until later into childhood. At this point the damage is done and can't be undone because that phase of development is finished.
Children who were exposed to alcohol and cigarettes during development have a much higher chance for mental illness and depression which can be debilitating in their own right. Being a good parent and reading to them may have an impact, but how well will they function as an adult and how enjoyable will their lives be if they constantly have to struggle with depression and mental illness or other disabilities? Some of those issues also dramatically increase the likelihood of them becoming addicts themselves which is a difficult and tortuous path.
I am familiar with some of your other posts and am honestly concerned about the amount of alcohol that you could have exposed your child to, as 30 years old is young to experience some of the health issues you have experienced because of your use. It also seems that you have some unresolved issues to deal with which are difficult to do when you're not a parent, let alone trying to work on them when you have a child. Please don't think I am judging as I'm not, I was a horrible alcoholic myself and am just very familiar with different aspects of alcoholism (I also have chronic gastritis from drink and I hate it - you have my sympathies).
I think you should have this conversation and speak openly and honestly with your doctor and get their feedback. There may be tests that they can do. Having a child is a personal decision and I'm not going to make a recommendation one way or another. Your situation is a huge gamble. Things to consider, do you want children right now - are you ready to stop the partying? Is your health in a good state for children? Are you mentally prepared for motherhood, and do you have support for such a lifestyle change? Can you take care of a special needs child, both financially and emotionally? Are you prepared to take care of a special needs child who may never be able to live on their own as an adult? Do you have a plan in place to take care of both you and the child should you get bad postpartum depression?
I also want to add that becoming a parent is a personal decision. If you're not quite ready yet there is nothing wrong with terminating the pregnancy and waiting until you are ready. I understand that everybody has their opinion, but this is your life. You have to do what you think is best for you. Too many people enforce their ideals on others, and too many people listen to advice that doesn't work for them and end up miserable for years, if not the rest of their lives. Why bring a life into this world if you're not ready or it doesn't have a good chance to thrive or may be miserable for its entire existence? You have to do what you feel is best as you have to live with the consequences. please discuss your concerns with your doctor, and please do what is best for you.