Clomid first time user


So I went to the doctor last week and we are trying for number 2. My first go round femera is what helped me get pregnant. Well new doctor and he didn’t know how to dose he femera so he is starting me on clomid. I’ve only had two periods since stopping birth control in January so it’s very hard to predict anything. I started spotting a few weeks ago but not consistently and then today was a bit heavier where I actually needed to use a tampon. So long story short should I be considering this day one or should I wait until my next cycle to start counting? I only get three rounds of clomid so I really don’t want to mess this up. My doctor said wait until a period I just don’t know if this is the continuation of the spotting or the start of my period....sorry for the long post