Pregnant while breastfeeding after giving birth

Hi mommies! Ask ko lang po kung mabubuntis po ba ko agad after giving birth? Nanganak po ko nung December 3. Nagsex po kami ni hubby last month (February) withdraw lang po sa una then condom after a week tas 2weeks ago withdrawal ulit. Bale 3x kami nag-do ni hubby last month. Breastfeeding po ko pero nagpu-pump po ko. Hindi pa ko nagkakaroon ng mens. Do I need to take pregnancy test to check if I'm pregnant? Worried lang po ko na mabuntis agad kasi ayoko pa pong mabuntis ulit. Sana mabasa niyo at may magreply. Thanks in advance!