Messed up BC not sure if I had spotting

Im 20, my fiance and I have been ttc for 14 months, we have been through the stages of 'not trying' and trying and supliments and these last 3 months I have been back on BC pills just to try to regulate my cycle and then maybe concieve better once I stop taking them. But in this last week, I missed one pill, took one the next day but vomited not long after, missed the next day, took one the next day and that brings us to today. Yesterday I had a really light period, then it went quite dark but quantity was very little, it lasted one day and then stopped. (I NEVER bleed for less than 4 days) but, I don't know if that was due to me messing around with the pill so much. The other factor to this is that I missed one pill before my last 7 day break and then missed 3 pills straight after it, I have read that missing pills at that time can give your body the chance to ovulate again because you give yourself more than a week break.

Im really just wondering about the spotting, has anyone ever spotted and it was dark like a normal period but only lasted for a day and ended up being pregnant?