There is a place in this forum for logs, if you plan to maintain one.
http://forums.jpfitness.com/training-log/
When I first did break in, I never did these types of exercises, so I didn't know what to pick for weight. So, on static lunges the first time I ever did them, I used 60 lbs. I could barely walk for a week. It was insane. Everyone is different with soreness, but it is pretty natural to get sore, especially starting fresh.
Unless you feel the weight is crazy light, I would stick with the weight (or go down if you have to), and increase it the next time you exercise. Especially if you haven't worked out in a long time, and are not used to these exercises. break-in is a good time to focus on form, rather than lifting heavy weight. There will be plenty of time for that in the future.
Good luck. Stick with it, and it will be worth it.