Should I test?

I lost baby mid November and had a DNC to make sure everything was gone. Was told to wait 3 cycles before trying again. Well we had a couple opposes and did not use protection. I am three days late do have some stress with family stuff and our one year old just had a scope done. So trying to decide if it's just the stress. My ob also said with next pregnancy she wants to see me at 6 weeks so if I am pregnant I will need to call to get in in the next two weeks. If I understand the date type things right. I tested yesterday and was negative but my one year old said baby today and pointed at my belly. How long should I wait to test again or should I call my doctor and try to get in?