Hi Katy and welcome to the forum I'm sorry you're not feeling well. Since you are gestational, I would suggest you see your doctor straight away. This may not have anything to do with diabetes. Let us know what he says.
You yourself know the remedy cut on junk food because they are rich in Sodium and Trans fat which is more harmful than overeating of normal staple diet. Moreover they are stale and need preservatives for longs shelf life it throws out your wind energy out of balance and you always feel tired and in depressed mood. Eat fresh eat healthy and stay sound.