Depression/Postpartum

Jamie
I'm very confused whether I'm experiencing postpartum depression or grief. I had my son five weeks ago and I have no ill feelings towards him only love. I mean sometimes he fusturates me to no end (reflux and extreme fussiness), but I think that's normal. However I'm severely miserable. My mom who is also my best friend is really sick with terminal cancer and it just went into her lungs. So my emotions I'm sure fit for the situation. But I'm crying all the time and I'm very depressed. Should I go on medication or just deal with it? I'm not sure they would even help.