Any input would be appreciated

My son is 4 months old. About a month and a half ago I had to stop breastfeeding because he couldn't break down the protein in my breastmilk. I still haven't gotten my period to return. About 4 weeks ago I noticed I had a lot of cervical mucus. It is still here and a good amount. Sticky. Any thoughts on what this means? I thought at first my cycle was returning, but it's been happening so long now I'm concerned there may be a problem. Thanks!