so my son is 3 months and 4 weeks and i am 4 days late 😱 I want to say is the stress with everything…

so my son is 3 months and 4 weeks and i am 4 days late 😱 I want to say is the stress with everything that has been happening. last month was horrible, and I went into bad depression even started to lose weight and wasn't producing enough breast milk. I'm producing more now, and my depression is not as bad. so I want to say that's why I'm late, should I wait 1 more week or just take a test?