I didn’t test positive until the day before my period even with sensitive test. There’s still time!
11DPO is still early. With my first born I didn’t test positive until I was 2 weeks late. For all you know you may have ovulated later than you think as the LH tests can be unreliable too as it can’t promise ovulation has occurred or when x
Give it a few more days. You’re not out until your period comes. Positives can show any time between 6-14 DPO