Tsd, I'm so sorry that your rattie passed away. The time was very close and you've been a good "parent" to the little one and were there when your rattie need you the most. Take some time to mourn your loss, but know that both ratties are now watching over you from across the Rainbow Bridge.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.