Weight lifting is fine, especially if it is 8lb weights which is fairly light.
Yes, I have a routine although I was very tired in 1st tri.
Here is my routine - FYI I am into Olympic & power lifting so it is very scaled back - 40-60% of your regular weight is recommended. This usually takes me 30 min (the 5k walk is separate with my dog, that's 1hr) cause it is scaled back.
Day 1
Cardio- 5K walk
Weights-upper body
Pushups - 12 + 10 +8 + 6 (bodyweight only)
Bench press *incline* (no flat back!) 12 + 10 +8 + 6 (30lbs), I did 65lbs before
Chest press 12 + 10 +8 + 6 (25lb,30lb,35lb,40lb)
DB curls 12 + 10 +8 + 6 (25lb,30lb,35lb,40lb)
Day 2
Cardio- 5k walk
Weights- Lower body
Squats- 12 + 10 +8 + 6 (45 total), bodyweight only (I did 5x3 @ 120lbs before)
Good Mornings 12 + 10 (broom) +8 + 6 (45lbs bar) (I did all with 45lbs before)
Lunges 12 + 10 +8 + 6 (no weight)
Step ups 12 + 10 +8 + 6 (wearing 7.5kg backpack)
Calf raises 12 + 10 +8 + 6 (wearing 7.5kg backpack)
I walk the 5k everyday and do weights 4x per week (Day 1, Day2, off, Day1,Day2, off, off)
*Just remember to compensate for calories burned! I burn about 300-400 per day just in that but it needs to be replaced, never eat at a calorie deficit in pregnancy