Workout that focuses on the core muscles will help. However, you should clear with your OB Gyne if you can start doing intense core exercises. If not yet allowed, stick to brisk walking and and mopping the floor manually using your legs to tighten stomach and leg muscles. Shift to intense workout when it's already safe. Google for more info.
Hi tara, I found that focusing on certain muscles when doing household tasks helped me. When vacuuming do lunges and hold in your stomach. When hanging out washing strenghten arms by focusing on biceps and moving slowly. Try and focus on core muscles when making beds and cleaning the bathroom. Dont forget to put bub in a stroller and go for an afternoon walk. If your not feeling energetic (lets face it. Babies take it out of you) these little trick will help. Once those levels increase you will be able to focus on typical excercise routines and maybe even hit the local park to amp up the adrenalin. Good luck.