Thanks for writing to DoctorSpring.com with your health concern.
First of all these kits are not very reliable, they are not the gold standard. You might have ovulated without the kit showing it.
Using timed intercourse is not a reliable method of contraception, but condoms are safe.
I do not think you would be pregnant with two condoms, and coitus interruptus, PLUS the safe days of the cycle.
Just wait for your periods, and stop buying these expensive tests to predict the LH surge. As long as you use condoms and avoid fertile days ( if your cycles are regular ), you are protected against pregnancy.
All the best & Please feel free to discuss further.