Fourth day into placebo pills and no period?

It can come ANY time this week! Even on the last day! You may not be regular every single month. Some months, for whatever reason, your body just changes. This is what makes tracking fertility so hard in women. If you have been on the Pill for three years and you take your pills on time, with no misses, then you dont need condoms for contraception (not getting pregnant) Condoms at this point are to prevent STDs only, so if you are only using them for part of sex, you might as well dispense with them altogether. There is no reason to use them. You have already exposed yourself to penetration so they arent going to help with STDs and you dont need them to prevent pregnancy as long as you take your pills correctly. Your birth control pill fully covers you from the possibility of pregnancy so there is no need to pull out or use a condom for ejaculation. This isnt giving you any "extra" protection anyway since men leak sperm LONG before they ever ejaculate. They cant feel or control this leakage but it occurs. You hear it referenced to as "pre-cum" sometimes, so it is rather silly to just use a condom before ejaculation-there is no sense in it and no reason to. You are on the Pill so you are protected as long as you are consistent with taking it. More than likely your period will show up in the next day or two. Skipping a period can happen here and there. That is no big deal. We humans are just not clockwork regular organisms. Nature is not regular. If it were, natural birth control would work better (just avoiding sex on fertile days) but since we are not regular, this method doesnt work because we can never be sure. So relax, you are protected. Stress and worrying about becoming pregnant can delay your cycle. So stop worrying!