First off Congratulations on your new baby
I went through the same thing with my lil one when I first got her, she was also 10 weeks old....I took her with me to work for the first two weeks, but the first day I had to leave her home in her xpen was the worse for me, I was soooooo worried about leaving her home alone.....So, I thought I would try getting her use to her xpen in the kitchen during the day while I was still at home....well she would cry like crazy...in checking on these boards
I was told that as long as she was able to see/hear me she would carry on with her crying........once I left the room she would quiet down after about 5-10 min...I went back to work and had a neighbor who came by and listened at the front door for her whinning/crying or screaming and she was to give me a call at work if she was making any noise....well luckily I never received a call and my neighbor told me that she was quiet during the entire day...She is now 7 mths old and is still in her xpen during the day in the kitchen during the week, weekends and evenings she has the full run of the downstairs/back patio.......I have thought about giving her full run of the kitchen with baby gates up to confine her, but she is in that wonderful chewing stage and is enjoying chewing everything/anything she can get her lil mouth on...
Sooooo, putting the full run of the kitchen on the back burner for now to save my baseboards/cabinets ... hehehe...Hope this helps...