Confused ?

Patricia
Hey everyone, so I had a miscarriage in November and had a D&C on December 1st. I got my period again on December 24th and ovulated January 11-12 (OPK). 
I was late for my period Tuesday so I tested and got a vvvvfl. Now I tested again this morning, 2 days later and (16dpo) and the line is even lighter or barely there. 
My boobs are sore, I have cold symptoms and my back has been hurting. 
I was just wondering if it's possible that I am pregnant or if anyone experienced anything like this or have gotten positives later than 16dpo. 
I am nervous that it may be a chemical pregnancy. Any advice would be appreciated. Thanks so much!