I inspected my hive today, day 10, and I didn't see any larva. I started the hive with almost two full combs from a fellow beekeeper and now have almost five full combs. They are being fed sugar water. One week ago at my first inspection there was what I think was pollen on the first two combs; it was a clear liquid. I was hoping that that there were eggs and I just couldn't see them and I expected to see larva today. Three days this week the highs were in the mid to lower 50's and I warmed the sugar water each morning. Today 95% of the pollen was gone from the combs and there was no larva. The bees are still bringing in pollen, should I be concerned?