Help! Possible bfp while on bcp?

I had unprotected with my partner on cd14. I then missed (for the first time in the 5 years) my bcp on cd16 and cd17. Subsequently, I got af on what would have been cd18 through cd23. Once the next Sunday rolled around (I'm a Sunday starter) I started taking my bcp. Before that Sunday I had three days of no af or bcp. I had unprotected again (with my loving, committed, monogamous partner) the Tuesday after the Sunday I started taking my pills again (now CD 12 since it all started over after I missed my pills on first cd16 and cd17). I have been having every textbook pregnancy symptom. Sleepiness, nausea, canker sore (which I haven't has since I was a kid!), runny nose with bleeding, what appears to be implantation bleeding, big sore bbs, veiny chest. But I know these could all just be pms. I'm waiting to take an hpt until missed af but is it possible that I'm pg?