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Dear Customer
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are you pregnant :
its unlikely to get pregnant in this situation , but nevertheless , you still need to do the prenancy home test 
- usually during using birth control pills , its possilbe that period get changed in date 
how to make sure of pregnancy :
1. do a pregnancy home test at the first week of the next period 
2. do a pregnancy test in OBGYN clinic at the first and second week of next period 
early pregnancy signs :
1. delayed period 
2. headache 
3. frequant urination or urge to urinate 
4. changes in breast shape and size and may have some pain 
5. increase vigainal discharge 
6. morning sickness
7. vomiting and abodiminal discomfort 
8. constipation 
9. change in mood stutus 
possible other causes to delayed period :
1. malnutrition and low weight 
2. Hormonal changes 
3. Some medications such as Medroxyprogesterone acetate
4. stress
5. Obesity
6. Thyroid diseases
7. gastic system disease (wheat allergy)
8. ovarian cysts 
our advice :
do the home pregnancy test as we mentioned earlier , and if the period didnt start in 10 days , we advise you to consult OBGYN doctor 
You can also ask our other certified experts in various fields such as: Nutritionists, Lawyers, IT Experts, Therapists, Mechanics, Doctors, Handymen, and more.
Kind Regards