opinions ladies.

On December 11th I had a dnc. I had an ultrasound to confirm no tissue was left behind.. also Jan 16th I had labs drawn and my hcg level was 40. Jan 19th I retested my hcg and it was at 32. (Decreased like it was supposed too) well last week I had some brown discharge (spotting) along with cramps.. and today I notice I have some white discharge. I took a first response and there is a very faint line on it.. do y'all think this is a new pregnancy or left over hormones?????