5 DPO symptoms or Clomid?

Cheri • Zoe 2-22-15, Link 6-8-19

This is my first time taking Clomid, we have been TTC for about 16 months. I took 100 mg days 3-7 and am currently at 5 DPO. For the last 3 days I have had a sore low back, my uterus feels achy, creamy CM and today I had 2 small bouts of nausea.

Is this the Clomid? Has anyone else experienced pregnancy symptoms at 5DPO?

Thanks in advance!