Face looks blotchy after core2 laser treatment

This is difficult to answer without pictures. I recommend following up with your Doctor about after care. I recommend skin care with vitamin c, b5 hydrator, silicone based scar gels with growth factors and enzymatic washes with papaya enzyme. PDT therapy can help calm inflammation. Typically I recommend adding clear and brilliant, fraxel, viva 4-6 weeks after co2 to improve results along with microneedling/prp to get the best outcomes with texture and tone.  Please see an expert. Best, Dr. Emer

After any laser resurfacing procedure, the skin may look blotchy as different areas of the face heal at different rates and skin will flake from the most dynamic areas first.  The technique used during the procedure may also affect the appearance of the skin during healing.  The more uniform the treatment, the more uniform the healing.  After a CO2RE treatment the skin usually sheds at 4 to 5 days and may remain "pink" for another 2 to 4 weeks depending on the percentage and depth of treatment.  
Protect your skin from the sun, follow up as directed and you will have great results.  Any unevenness can be corrected with another treatment or touch up.  
All the best, Alexis Parker MD