Pregnancy paranoia

[klmcdan]

I have been on birth control pills for over a year now, currently am taking Levora.  However, last month I delayed my period by taking extra pills which left this month's pack a little short (with 16 active pills instead of 21).  My doctor told me to jsut finish out the pack with the 16 active and then on to my 7 placebo so that I do not mess up my cycle any more and so I did that and got my period during my placebos and then started my new pack.  About 5 days into the current pack, however, I visted my boyfriend and since I did not know if my protection was compromised from the shortened pack earlier, instead we had anal sex one night... and since everyone tells me that semen can leak from the anus to the vagina, I put vaginal spermicidal gel into my vagina in case that happened and the second night we used a condom (which had no sign of breakage) and vaginal spermicidal gel.  We are both STD/HIV free, recently tested and very monogamous.  However, I hate that thinking that my BCP was not working because just using condoms and spermicidal gel has me concerned since they seem not as effective.  What is the effectiveness of using those combined? And was my protection with the BCP compromised? I could never get ahold of my doctor in time to ask her and my pharmacist thought that I would be considering I had my withdrawal bleeding and then went on to my active pills so I am just really confused and now concnered.  Thsi was just yesterday so I still have another few weeks before my next period and I don't want to be scared this whole month.