scared might be pregnant with bby #2

so long story short i just had my daughter jan 11 2019 and ive been feeling really off, lower belly cramping, slight nausea, boobs hurt so badly i can barely touch them, very moody i take zoloft for ppd and even with it im still moody and highly emotional.

my question is should i test to make sure or not and when should i test because im a first time mom and knowing when to test after giving birth is impossible for me to figure out

i already had my first period the 12-15 and i was spotting a couple days ago only lasted for a day though and stopped

im nervous and scared right now