Advice please!

I a regular periods between 26-29 days. It last from 5-6 days. Normally heavy and i usually spot 1-2 days b4. This month i was a day late, no spotting, had cramping only on the left side two days b4 my expected cycle. The 1st 3 days my cycle was light to medium of a flow. I has diarrhea, nausea and i threw up out of no where. I also have been super hot at night to where i have to sleep naked or with a fan. Late night the 3rd day it stopped. 4th day spotting, very light flow thrn changed to brown on 5th day still brown. Only get nauseated in the morning and im wiped by night fall... i am ttc concieve. I have been having unprotected sex for months now and using ovulation kits.. please help? I think i may be pregnant or have pcos