Congrats on your pregnancy hun.... It sounds like you really have your head screwed on right, and you will make a fantastic mum.
About your husbands family... Is there any way you could talk to him about it..? What does he think about all of their "advice.."....??
I know this sounds horrible, and sooo hard to do, but you really need to stand up for yourself. If you do it while you're still pregnant you can blame it on hormones.. :P
No but seriously... If you let this continue, they will always think they can control you and tell you how to raise your child. THEY ARE NOT YOUR CHILDS PARENTS!!!!! You and your husband are the parents...!!!
The next time they come with some condescending "advice" I would just say something like - LOOK, I am going to be a fantastic mum, and if I want anymore of your ridiculous advice, I will ask for it!!! But until then, ENOUGH!!!!"
You can do it, I am quiet a shy person, but I did it to my MIL who was pretty much saying I need to get my DD watching these "your baby can read" DVD's for 2 hours a day.... She's only 10 weeks old..! I'm not ever going to just sit her in front of the tv for 2 hours a day!!!!! I pretty much told her Leila is my daughter, and I will manage her education when and how I want......
Good luck for the next few weeks... I can feel that your family in laws are going to be a bit of a handful. HUGE massive big squishy hugs. xo