Advice needed

Hi! I found out I’m pregnant on Saturday night at 10 DPO. That night I had horrible pains in my lower left abdomen. They hurt when I moved and breathed but when I was still, it didn’t hurt. The pains went and have come back but just not as bad, it’s just a little uncomfortable when I move a certain way. My tests aren’t getting darker (they were faint but registered on a digital test) but I’m not sure how dark they should be. Just wanted to see if anyone else has experienced this and if it’s normal for tests to not get super dark until later in the pregnancy. Thanks!