Jessica also sometimes tearful when she wakes. I think it's usually to do with her still being tired though and being annoyed at being awake, as sometimes she will drop back to sleep afterwards.
Nazly - could you possibly do a staged return? Might help both you and DS adjust to going back to work / nursery.
I'm lucky to have a year off. Have already spoken with my boss though about my return to work hours (as I work variable shifts currently as a nurse, but need set hours for my return as Jessica needs to be booked into the nursery for set days). The only way we can make it work financially around DH's 9-5 job is for me to work double shifts two set days a week I.E, 6.45am-9.15pm tues and thurs) and a one weekend day (DH is home then so need for nursery) so we only have to pay for two nursery days a week, as if she was booked in 5 days a week our nursery fees would be nearly £1000 a month which would be completely financially unviable for us). It does mean though on my work days I won't see Jessica at all and they will be bloody long, knackering days, so I'm not looking forward to it. 
Would love to go part-time but don't think it's financially possible at the moment - I'm the higher wage earner out of me and DH and me going part-time would put quite a dent on our finances. Sigh. On the flip-side, I have stated to get a tad [whispers] bored and lonely sometimes at home, and it can be a bit relentless sometimes doing child-care all the time, so maybe it'll be nice in one way to go back, but overall I'm dreading it.
In other news Jessica did her first night in her cot-bed last night. It took her a while to settle and I had to go back to her several times but one she was asleep she was no different to how she is when she's been in her basket. Hopefully after a few more nights she'll get used to it!
In other news is anyone else's LO really noisy at the moment. Jessica has discovered her voice and is chattering away constantly, or making 'ahhhhhhh' noises all the time. It's quite funny!