Possible mucus plug... (graphic image, warning)

Married mother of one little angel. 10 months old. I got my IUD placed a few months after he was born.

I seem to be having pregnancy symptoms though, extra veiny blue breasts, extreme dizziness, nausea, mild cramps, back pain on my left side.

Does this look like a mucus plug? Getting a blood test tomorrow. Please help, thanks!