I eat up to 8 ounces of food at a time with no problem and I eat kind of fast. Is this normal?

That's a lot for 5 weeks. And fast eating is not a good idea because it's so easy to miss the cues that you've had enough.

Did you have the sleeve or Rny? For RNY that would be way too much for 5wks out. I wasn't eating more than 1/4c of anything for the first 6 months. Regardless of which surgery, eating fast is not your friend. It compromises your new stomach and can lead to overeating down the road. Take small bites and chew them thoroughly even when it's mushy foods. Take the time to taste it all and take a full minute between bites. That's the recipe for long term success.