I would certainly ask you OB/GYN and discuss this with your management on the things you can and can't do during this time so you are officially excused from it!
I have two pregnant gals at work on my floor...they avoid MRSA pts, Chemo Pts (even though that is debatable, but they don't feel comfortable, and since they aren't chemo nurses...I don't find a probelm with that). Lifting is going to be an issue so your more robust pts you will either need help or others need to do any tranfers or position changes (again according to your OB/GYN on allowed lifting weights per progress of pregancy).
Most of the gals I know that are pregant are more concerned about work related stuff than home stuff too! Don't forget to ask about limitations in the home as well. I know stay totally clear of litter boxes (do not clean them yourself!)...during certain parts I was not allowed to mop/vaccuum because I was in a franks breach situation and had to be resting (I wasn't a nurse then)...and other items to avoid in the home.
As far as meds, I know your OB/GYN will know this one...and all I remember is prostate meds are a no no to handle without gloves, certain chemo drugs, certain steroids, nitro... But hey...if you aren't sure...glove up