Craving sugar - what does it mean?

Lyanna

I am badly craving sugar so many times a day, feels like i cant function unless i eat something sweet (mostly chocolate) quickly. This has all started after 28 weeks. Could this be indicating something? My diet is pretty okay otherwise, I am on regular iron+zinc and calcium+vit d supplements.

Fasting and PP sugars were 85 and 88 respectively.