pcos and possible prego

I'm new too this group but maybe one of you lovely ladies can help me out. I have been feeling like I may be pregnant but have been having signs like nauseous but only at night evening time like when I'm at work never fails I get hot a lot headaches my boobs were sore but not soo much now they do feel heavy and I am 5 days past my expected cycle I am however having was dark brown but now light brown spotting I feel bloated as ever I can eat something and than maybe 30 minutes later I'm hungry again. I'm concerned about the brown spotting so I do go too dr on the 9th. Any of you ladies experienced anything like it