How much is too much? Help?

I was banded Jan 21, and so it's only been a few weeks. I liked to exercise before my surgery, and was up to walking a few miles 3x a week or so.
Now I am walking (fastish, still too fat for jogging, usually 4 miles or so) for around 75 minutes a day as well as biking (again, pretty hard) 45 min a day, 6 or 7 days a week. Since the banding I have lost 27 lbs, which I think is okay? I am 251 now.
But sometimes when I begin my workout, I feel kinda crampy in what I think is my port area, but it usually goes away in about 20 min. Am I hurting it? It feels creepy.
The surgeon (not my own) recommended only a mile a day for walking, but he didn't know my prior activity level. I can't tell anything from my heart rate because of blood pressure meds.

I was banded in Oct '09 and was told by my surgeon only walking for the first month.  You may want to post this question on the lapband board in order to get more response.  Good luck.

 I would take it easy until you get the okay from the Dr.  At  4 weeks out I was given clearance to do everything again.