Clomid

Br
I need some help ladies. So just a month ago I was diagnosed with PCOS. We tried for a year before I started questioning it and now here I am. My doctor prescribed me clomid. My husband is going tomorrow to get check as well to rule that out. 
Here lately my period has been on a month and off a month but now I started spotting on Saturday and Sunday the same maybe even less. This morning wasn't much different. So I decided to call the doctor, but by the time I heard back there was a light flow and she said to count today as day 1. I am suppose to start the clomid on day 3 but now it has went back to basically spotting. I don't know what the heck to do because this is not normal for me. I either have a "real" period or not at all. The nurse did say to take a test so i was planning on that in the morning. I don't want to waste or mess up when taking the clomid but I don't wanna wait to start it either. 
Does anyone have advice?