Those readings are noticeably lower than your usual range, and combined with the tiredness you mentioned, I think it is worth getting it checked out rather than just waiting to see. I would call your gynae or even just pop by the polyclinic first, since they can take a proper reading and ask you the right questions about hydration, diet, and whether anything else is going on. Honestly, I once brushed off similar fatigue and low readings thinking it was just tiredness from running around, and it turned out my iron was low, so sometimes there is a simple reason behind it. Better to get it looked at and have peace of mind than to keep second-guessing the numbers at home.