pregnant again or old hormones

Ashton
I just gave birth to my miscarried twins on the 11th of this month. I was supposed to be 16 weeks but they measured out to be 14 weeks. My boyfriend and I have had sex 4 times since the 11th and I'm wondering if I'm already pregnant again or if it's just the old hormone levels. I'm going to my ob appointment in a week and I'll find out then but the top picture is from 3 days ago and the bottom is from today. You can barely see the line but does it look like it's getting lighter or darker?