Hello, and I hope I can help you today. Pregnancy symptoms vary widely between women, and many of the same symptoms (including a temperature jump) occur with PMS as well as pregnancy, and the most common sign of pregnancy is actually a missed period. Urine pregnancy tests purchased over the counter are just as accurate as a doctors office, so if you have already have had multiple negative tests, you are definitely not pregnant. Your menstrual cycle may be irregular this month for a number of reasons- the most common one being the stress of trying to become (or avoid) pregnancy. So if you are trying to conceive, I recommend just having regular unprotected intercourse (at least 2-3 days/week) without BBT charting, actually because your body temperature only goes up AFTER you ovulate, so if you wait for your temperature to go up, you can miss your fertile time. Furthermore, if your cycle is longer than average, your ovulation actually occurs later, more around day 16-17. So I would wait a bit longer and see if you develop a full menstrual flow. Once you do, the bloating and other symptoms should go away. If you continue to have irregular cycles, you may want to see a local physician for a hormonal evaluation. I hope I was able to answer your question today and that my advice was helpful. Best regards, Dr. Brown