Spotting or light bleeding six to 12 days after your last period could indicate a fertilized egg has embedded itself into your uterine wall.  Some women may feel cramping, as if they're about to get their period. The spotting can be mistaken for a light period, particularly if you have irregular periods. Swollen and tender breast tissue is a sign that hormones are changing in your body. They can begin one to two weeks after conception. Your breasts might start to feel heavier, or fuller.  If you frequently have tender breasts, move on to other symptoms to determine if pregnancy is likely. Some women may even increase in bra size within a few weeks of getting pregnant. If this is the case, you may be pregnant. Your areolas may also start to darken. This change is also caused by hormones from pregnancy. As your body adjusts to pregnancy, women usually start to feel tired and sluggish. This can occur as early as the week of conception.  Fatigue is a result of increased progesterone, which makes you sleepy. If there’s a chance you’re pregnant, avoid treating fatigue with caffeine. Caffeine isn't proven to be harmful at this early stage but if consumed in excess it can increase the chance of miscarriage. The exact amount is not known, but 200 mg is generally considered the cutoff. Morning sickness can start at about two weeks after conception and continue until eight weeks after conception. If you start to feel regular nausea, it is time to take an at-home pregnancy test.  Nausea may also accompany food aversions. Some of your favorite foods may make you feel ill while you are pregnant. Nausea may not always be accompanied by vomiting. You may notice an increased sensitivity to smells. Even smells you may once have enjoyed may now trigger nausea. Even in early pregnancy, hormones alter your desire for particular foods. You may crave strange combinations of foods that you've never desired before. Your formerly favorite foods may cause nausea.  You might notice a metallic taste in your mouth. This is normal in early...

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Write a summary of the previous text in Vietnamese:
Dấu hiệu ra máu khi trứng làm tổ trong tử cung. Dấu hiệu đau ngực. Lưu ý cảm giác mệt mỏi. Cảm giác buồn nôn. Dấu hiệu thèm ăn hoặc sợ đồ ăn. Triệu chứng đau đầu, đau lưng và đi tiểu thường xuyên.