Not even sure what to think anymore... My last period was in June but was very light and only a couple days. I've taken 5 pregnancy tests, one of which was a blood test and they've all come back negative. But, I've had nausea, vomiting, mood swings, sore breasts, constantly exhausted, weight gain, and flutters that only seem to happen when I'm relaxing or just ate something sweet. What the heck could be wrong with me???