MillyC you're right, it can just take a while. the best advice is dietry b/c you're essentially waiting for things to return to normal post bc. it is a great idea to start temp charting now so there is some info if reqd down the track. But all you need to do for the time being is maintain a healthy lifestyle, ie work/play balance, diet and exercise and adequete sleep. some foods which may help to return the CM which you can add to your diet where convenient are;

Aduki Beans, Apricot, Beef, Beetroot, Bone Marrow (stock), Chicken Egg, Calamari, Dandelion (tea), Dark Leafy Greens, Dates, Dang Gui (chinese herb- angelica) consullt with a Dr of Chinese med for this, Grape, Kidney Bean, Longan, Microalgae (seaweed / spriralina), Nettle (tea), Octopus, Oyster, Parsley, Sardine, Spinach, Sweet Rice, Watercress

Apple/ Asparagus, Cheese, Clam, Crab, Duck, Duck Egg, Honey, Lemon, Malt, Mango, Milk, Pea, Pear, Pineapple, Pomegranate, Pork, Rabbit, String beans, Tofu, Tomato, Watermelon, Yam

I hope this helps! take care and all the best!