Ovulation tests?! Confusing after MC

Ttc #2 after a miscarriage 16/11/15 @ 14.3 weeks...
Had AF 19-24 Dec (could probably say 23rd but spotted once on 24) 
Using these cheaper CB tests and have also bought their pink digital one (tend to do that at 7pm each evening and these at random times because I'm new to this testing and ttc) 
What do you think? It's not as dark but darker than yesterday?