Sounds like you’re getting some dawn phenomenon, where the body has an increase in blood sugar due to hormones like cortisol being released before you wake.
I would keep going, since you’re losing weight and I suspect as insulin resistance goes down as time goes on and you continue to fast, it will lessen. I kept track of mine using test strips in a cheap meter, and my morning fasting blood sugar slowly went down. Hope this helps!
I highly, highly, highly recommend you take a minute and check out the YouTube channel for Dr Rob Cywes. He is a brilliant, experienced surgeon and researcher who can explain it all:
Hi! I’ve been recently diagnosed with pre-diabetes, insulin resistance, diabetes (3 doctors I spoke with called it differently) but I am taking metformin 2x500mg at evenings, no insulin.
I am checking my blood sugar every morning and it tends to fluctuate a little bit but it never goes too high even after eating, so if yours stays okay during the day after the meals I’d say it’s ok too.
I am also fasting 16:8, or 18:6 when I actually forget to eat, and I am feeling alright. Give your body some time to adjust, usually it’s a month or so until it all should settle down. But if you continue feeling weird I’d definitely check with your doctor.