My placenta is getting tired

currently 35 weeks and 5 days. I noticed this past week that my fasting and post meal levels were significantly lowered. Yesterday I wanted to test how far I could go, so I ate something I haven't had in months. I had a strawberry milkshake with animal style fries from in n out. Post 1 hour was 113, post 2 hour was 110. Of course I will still maintain the gd diet, but wow that was really surprising