Anxious

My blood HCG has been good, 11dp5dt was 646, 13dp5dt was 1944. Clinic didn’t want any further bloods. Today I am 15dp5dt so took a Clearblue digital expecting a 3+ (threshold is 2753) so I should be well past that by now. But I got 2-3 weeks again.

Has anyone had this happen and been ok?