I got a positive first response 4 days ago at 12DPO and a day later got a "positive 1-2 weeks" clear blue. I've been nauseous since then but noticed yesterday and today the nausea had stopped. Did a clear blue digi last night and it still said "positive 1-2 weeks". Something just still didn't feel right as the sickness still had gone so I got a first response and clear blue digi today. First response was still a faint positive (I'm now 2 days late for my period) and it was as faint as it was at 12 DPO no darker. So I did a clear blue digi and today it said Not Pregnant. I'm assuming I've had a chemical pregnancy?