My DS is 3.5 and I am 8 weeks pregnant. I am not feeling well at all. I don't feel too bad in the morning and I can usually play with him early on, and sit with him while he eats/eat with him. By mid afternoon I feel really ropey. I am struggling so much with being present with him and then the inevitable guilt when I can't do as much as I usually do. Thankfully my partner is working from home and he comes and helps out with dinner, which is my worst time of day. But we've been watching so much TV 
I've also been saying "I'm sorry, I don't feel well enough to do X, but you can pick a book and I'll read with you." What did/do you do? And, for those who have been there, do you think your older child remembers or was affected by it? I just feel so sad that my DS is getting a bit short-changed at the moment. He goes to nursery two days per week which is great for all of us.