What if the tablet was not tightly closed?

Good morning At the outset I will apologize for the complicated message and inquiry. For 5 months I have been taking vibin mini tablets In that month I could not take them in the apartment only had to take them during work I tried to take care of them as much as possible but it seemed to me as if the tablet in 3 weeks (Thursday) was not completely well protected although I am not able to say this because I did not pay so much attention to observing the back of the package but what if it was not tightly closed. The bleeding occurred a day later but occurred normally but I was induched with my partner in the evening when the bleeding began without additional protection. Was there a risk of becoming pregnant? Now that I'm industrion, can I not be fully protected by taking the tablets from the new blister? I ask because For some time I have a lot of pressure on the bladder and I'm just afraid if I'm not pregnant.