D dimer usaully takes weeks to months to get normalise completely.
Crp comparitively takes lesser time to normalise.
Both are considered as markers of inflammation going on in body against any insult(usually a viral or bacterial infection).
Next Steps
Get repeat
CRP done after 3-5 days,
and with proper treatment and good response from the body you will notice the crp start decreasing.
And D dimer will start decreasing little late but not to worry about it much.
Health Tips
proper steroid and anticoagulants treatment will help in reducing the levels of D dimer and
crp.