First off women are confusing pregnant or not. A pregnant lady is like a delicate flower that you need to nourish. As far as the sex issue goes you just need to man up and take matters into your own hands. Now with my ex wife and my current and final wife about three or four months into it they were supper horny and I got wore out now not all females are that way. During this time of no sex work on cutting down on drinking I don't know how much you drink but if it is only once in awhile I don't see a problem with it but if you really are wanting to stay with her try to see if you can quit till after the baby is born. I stole a book from my wife when she was pregnant called What To Expect While Expecting. This book helps explain what is going on I also suggest getting her her own copy. I would not expect to much sex from her right now but it does not hurt to ask for it every once in awhile and if it is not up to your standards looks her in the eyes and tell her how good it was and that you love her. You should also try to do what buzz bee said to do. Good luck.