Any mummies experience muscle aches in the calves even if you didnt walk or move much? i've been waking up with aching calves and wonder what's going on..... :(

Yes, this is normal. Leg cramps usually start from week19 and last throughout the whole third trimester. There are many reasons why it happens - fatigue from carrying pregnancy weight - compression of the blood vessels in the legs - diet — an excess of phosphorus and a shortage of calcium or magnesium.