@Grundy...I am a bit concerned but do not want to worry you. I think on top of looking at your diet and making drastic changes by checking what you consume during the day, do not ignore that blood test. Then you can move from there.
I am doing an overhaul on mine and have learnt that I have been running on fumes for a long time. Stopped eating breakos, grabbing coffee and tea at work, lunch- soup, home collapse on a full dinner grilled or hurriedly cobbled up then wake up extremely thirsty. Result, opportunistic homas, coughs and feeling lethargic. My Job has no time for this. So I am reverting back to my routine back in the day. Start with fruits and carry on....during the day.
I/siblings have to endure that blood test every year don't want to mention it.