It is impossible to know whether the bleeding occurred because of premenstrual spotting or implantation blood without a physical examination. To get a clear idea, plz visist a gynecologist

In this case there's no chance of pregnancy.

Puberty can start at different ages for different people and there is a wide range of what is considered normal. 
The ability to have children (reproductive maturity) usually occurs after the completion of puberty when the reproductive organs, such as the ovaries and testes, have fully developed. For most individuals, this occurs in their late teens or early twenties. However, it's important to remember that everyone's development timeline is different.

its common to miss periods after stopping the pill for pcos.. HORMONAL imbalances cause irregular periods.. CONSULT a doctor if the absence of periods continues.. they may recommend MEDICATION or LIFESTYLE changes to regulate menstrual cycles..

CONTINUE taking 50 mcg of thyroid medication during pregnancy as TSH levels may fluctuate during pregnancy!! Lowering medication may harm the baby. Consult with your DOCTOR before making any changes.

It's unlikely that your fiance is pregnant Birth control pills alter hormone levels, which can cause lighter periods. However, if you're still concerned, take a PREGNANCY test or consult a doctor Remember, birth control pills are not 100% effective at preventing pregnancy, so it's important to use additional PROTECTION if you're not ready to conceive. 

It sounds like you had an ectopic pregnancy, which is a serious medical condition that requires prompt treatment. In most cases, surgery is necessary to remove the pregnancy and prevent life-threatening complications. As for removing both tubes, this may have been necessary depending on the extent of damage or scarring. It's important to follow up with a gynecologist or reproductive specialist to discuss any concerns or questions you may have about your fertility.

Irregular periods can have various causes, and taking medication to regulate them is a positive step. However, even with regular periods, occasional variations in timing can still occur. It mostly happens in maximum no. of women. if you feel you're experiencing pregnancy symptoms it may be a good idea to take a pregnancy test to rule out the possibility of pregnancy.

While it's less likely to conceive right after having your period, it's still possible to become pregnant at any point in your menstrual cycle, including during the days immediately after your period. 
If you've had unprotected intercourse and missed a period, it's important to consider the possibility of pregnancy and take a pregnancy test to confirm.