Hi,
I had to return to work PT when DS was 4 months old. It was a 'take it or leave it' situation and I couldn't afford to pass up on a job.
I felt really guilty but the things that have helped me have been:
1. A supportive partner who hasn't pressured me to go FT straightaway even though that would have brought in more money. He's also been very supportive in making sure I can keep BF-ing our son, taking over some of my chores to let me relax and express. He also works a halfday at the weekend so he can look after our DS for 1 morning per week, meaning our DS is in childcare for 2 days per week instead of 3.
2. A childcare centre that is caring and happy and the staff are very involved and spend a lot of time talking with us and keeping us updated on our DS's progress every day. I feel like it's an extra part of home and my DS is happy there.
3. Making sure I'm at work no earlier than 9 and out no later than 5 and spending time with my DS over the silly little house jobs that I used to stress over.
4. Having the luxury of my DH being able to take time off when I go FT in 6 week's time so that our DS doesn't go to fulltime daycare until he's 1.
If you have support at home and a good quality childcare place that you and your child feel comfortable in I think a lot of your guilt will subside.
Good luck!