Ovulation Help

Hey Everyone! I had a natural miscarriage about a month ago. My dr. monitored my blood levels and my HCG levels have finally gone down enough to give me a negative test. I would like to try and get pregnant again sooner rather than later but am struggling to know when I would ovulate. Haa anyone else had this situation? How did you know when you started ovulation after your m/c? Is it possible to ovulate this quickly after your HCG levels go down or does it take a while? 
Thanks for your input!