Red blood discharge

After afternoon nap, I felt menses pain. I thought it was due to stomach upset as I had diarrhea since late morning. I don't feel right and discovered that I have red discharge. Although it is just light spotting, I feel uneasy. I checked online again and many said this is a symptom of miscarriage. I am very very upset and cried for quite a while. What is going on.. what is going wrong. Am I not pregnant in the first place and menses came late?

You might be wondering why I didn't visit a gynecologist immediately. It is because first of all we are not sure whether I am really pregnant. We are planning to go Miami in coming week for a ultrasound. Second, it is not easy to find a gyne. and I have doubts in the medical technology here.