Babies will spurt since they're growing and I have never heard of an overweight baby snake. I wouldn't feed too often or too big of meals all the time personally, I would feed a correctly sized meal once every 5 days for babies.

For example, my little snow corn female was 33 grams when I got her back in November and as of Feb 6th she's up to 70 grams on fuzzies every 5 days. At first I did one fuzzy per sitting (when she was the tiny 33 grams) and she's now up to either 2 fuzzies per feeding or a mouse hopper every 5 days. She's growing like a weed and is healthy and IMO I'm not over feeding her.

If yours is taking multiple pinkies okay I would step her up to fuzzies.