Hello! I don’t think there any way we can manage it. It’s just part of e pregnancy journey tbh - hormonal changes. And furthermore, all pregnancies are different 😊
I also went through extreme fatigue nearly throughout my whole pregnancy previously, (there’s once I slept 23.5hrs and only woke up 30 mins to hv lunch then sleep back) of course e worse was during 1st trim for me where I can even fall asleep while at work unknowingly. In order to keep myself awake at work, or traveling on e road I will usually prep myself some sour plums or whatever sour stuff and it do helps abit.
Please try to get more rest if u can as your body is working very hard for baby 4.. 💪🏻
Mummy X