I hope this is okay to post.

Hello all, I hope this is okay to ask. Last week about 9dpo I got a faint line on a test. However the line has not gotten much darker imo. Does anyone have experience with this? Its been about 4 days since my first test and I don't feel like the line has changed much. My previous pregnancy we did iui and had a ton of testing available to us. But my line darkened very quickly.