Hi,
Chanced upon this thread.
Blur blur : I think yours most likely is hormones imbalance. It happened to me a few months ago. Symptoms like yours, brown discharge, feel horrible, dizzy, anyway just like being preggie.
Think you should go to see gynae. If you are scared that you may be preggie, the gynae could scan for you. She/he will be advise the chances you may be preggie based on the lining. So, best thing is go gynae, you get your answer and you can start on your new cycle. You drag on like this, it will only make you feel more horrible right?