Hi Amira,
Me and my wife were almost in exactly your situation last year. We've been going for the past 5 years, when my wife was pregnant with our first child and then next year when he was 9 months old. We're going again this year, he will be about 19 months and my wife is pregnant again. I actually had a ton of questions similar to yours I posted last year and several parents PM me to give me great advice on the dos and don'ts. There's too many to write her but message me and i would be more than happy to give all the advice I can. I do agree with geekyfamilyfriend, it all depends on your hotel situation. Last year we were lucky enough that a friend gave us his MGH hotel for us since my wife was still pumping and our son was young. I will say this, you will definitely need to modify your past excursions and will not be able to see or experience everything you had before, but it can be done. Message me if you want more info.