13dpo brown CM - AF or implantation ??

Rachel
Hi all. First month back to TTC after 2 early losses and a few months off. I'm 13dpo (based on a positive OPK on 12/22). According to Glow I start tomorrow or Friday. I've had two 30-day cycles and now today I'm on CD32. 
Which brings us to this TMI pic. Upon CM finger check, I got this. The last couple days it's just been egg white or watery. I've also had on/off period like cramps the past few days including today. I swore this was my month but so far tests are negative. 😔
Does anyone think this could be implantation or do you think it's my period? Ugh.