Maybe try a multi vitamin, Berocca, look at your diet, eat low GI food, keep well hydrated etc. None of that is a 'quick fix' but will ensure you are keepinp up energy long term, not just from taking a tablet.
Caffiene can be addictive, have serious come down effects, give you headaches, heart palpitations, anxiety, you might be awake but probably wont focus well, can change your moods etc.
Caffiene also dehydrates you quickly, and dehydration is one of the biggest reasons people become sluggish and tired.
I realise that if you have young kids and aren't getting much sleep that this would be the cause of the tiredness, but multi vitamins, B group vitamins and healthy food help you physically and mentally become stronger and get through the day.
Inliven powder is great for evergy too, and is also a superfood to make sure you are getting nutrients and a pro biotic to keep your insides healthy and clean!

A quick brisk walk outside, even for 15 mins will help wake you up and get your body pumping a bit and give you a burst of energy.

Good luck with it!

Ps: maybe get the doc to do a full blood test to check for iron deficiency, or other area's where you are low that may be contributing to being tired