Occasionally, periods can be a bit of light bleeding which can be mistaken for an early pregnancy. In addition to that, there are also symptoms like nausea, breast tenderness, and fatigue that can be a sign of pregnancy. Nonetheless, having a period is not a definitive indication that you are not pregnant. If you're worried, taking a pregnancy test is a good idea to make sure.

Yes, you can get pregnant after your last menstrual period on 16 Jan if you had an intercourse on 8 Feb, the chances of which largely depend on the timing of the ovulation and menstrual cycle regularity. If you have any worries about pregnancy or reproductive health, then please see the gynecologist for an examination and tips.
 

A pregnancy may take place if the semen comes into any contact with the vaginal area, whether there is a penetration or ejaculation. It is imperative to have barrier protection while engaging in any type of sexual activity because this way you and your partner will be prevented from having unwanted pregnancies and from contracting sexually transmitted infections.

The­ Depo shot prevents pre­gnancy. It blocks ovulation, so no eggs come out. Also, it thickens ce­rvical mucus, making it harder for sperm to reach an e­gg. If you had unprotected sex afte­r the shot, you're still protecte­d from pregnancy. But remembe­r, the Depo shot doesn't prote­ct against sexually transmitted infections.