Thanks for the query to ATD for an opinion,
If you just missed one pill on Monday and then supplemented it by taking two pill together on Tuesday and didn't experience any spotting on Tuesday then after having unprotected intercourse on Tuesday evening, still you remain adequately protected by your birth control pill and you need not take PLAN-B . Just continue the BC pack daily and regularly hence till you complete it religiously.
Please don't worry, you are pregnancy safe, as you did the right thing by taking 2 pills the next day which maintained the hormonal level preventing any ovulation.
I hope have answered your query in detail,
Wishing you safe sexual practices,
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