If it's your 4th pack since starting again and you are just starting with these symptoms I don't feel the 2 are related at all. If you are sure you have not missed any pills then chances are you shouldn't be pregnant. Even though some of these signs could point to being pregnant. Another possible is that you may be getting the flu.. and it's fighting your system. You don't say anything about a fever. There are several causes for these symptoms but to pin point what would be the exact cause would be hard without seeing you in person. I would take it easy and rest all weekend, make sure to drink plenty of fluid. Stay away from Cola, caffeine products try to drink water and juice. If you are feeling no better at all by Monday then make and appt to be seen. Also since you have the heartburn, try not to let your stomach get empty which will produce stomach acid. Try to eat a bland diet for the weekend too. Like soup, toast, crackers, jello. Stay away from fried, greasy, spicy foods. If you happen to get really bad during the weekend then you may want to go to the ER. But I think once you let your stomach settle a bit, get plenty of fluid you should start to feel much better.

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