Advice needed

Abbey

Hi all! I found out I was pregnant on Saturday night when I was 10 DPO. That night I started having terrible pains in my lower left abdomen and they got so bad through the night I couldn’t sleep. It was like when I moved or breathed it was a sharp pain. It got better the next day but the pain is barely lingering now. I had a BFP on Sunday with a clearblue digital test but my strip tests haven’t gotten any darker since Saturday. Should I be concerned since they aren’t darker? My period is due Thursday. Thanks!