Low blood sugar

Ma

This is my second pregnancy. I don’t have an heavy appetite this pregnancy(did with my son) but I eat pretty normal(2000 calories a day) Today all day I felt tired, weak, like I was getting sick or something. I have very easy pregnancies so this is weird for me especially at 17 weeks. I finally just had a sprite at 7pm and felt so much better. I think it’s due to my blood sugar. Anyone experience this? Should I be worried ?