Please help me

I have been feeling preg for about a week now but today has been the worst of all. I've been dizzy, extremely tired. Didn't get dressed til 530pm tonight, nauseous but not throwing up. I experienced spotting about a week ago as well. It was pinkish brown. More brown. Only when I wiped. I just had MC in Oct so I have had AF yet. Have mild cramps of and on and a very large appetite which is WAY out of the norm for me! Just wondering what you think! PS- I'm not 100% sure when I ovulated! Thank you!