Hello dear,
I understand your concern.
In my opinion there might not be any chance for
pregnancy in your case.
The following points favour the above statement:-
1)There was no irregular intake of pills.
Taking pill a few hours late doesn't alter the effectiveness of pills.
2)You got the periods on time and there was no delay.
3)All the urine pregnancy tests have been negative.
Though antibiotics effect the birth control pills all the antibiotics might not do so.
Only a few like
rifampicin,
rifabutin effect the
hormonal pills.
So relax.There is no need of any blood HCG testing.
If there is any pregnancy it would show up on urine pregnancy test also though late than
blood test.
So nothing to worry.Avoid stress.
Stress regarding the thought of pregnancy also makes one to feel the pregnancy symptoms.
Hope this helps.
Best regards....Dr.Srilatha