Serious inquiries only. Menstrual period abnormalities.?

On December 24th I had ual a # of times (the day of the accident)as well as the following day. The thing is....the 24th was the day after my period ended so I should have been safe. It is not unusual for me to have long cycles usually about 30 days. My last period started on the 17th of December. Therefore, I shouldn't have ovulated until about the 31st. Approximately the 25th day of my cycle I took my first pregnancy test. I also did an additional test around the 30th day. On the 41st day of my cycle I started spotting (4 days ago). It was light enough that I would only notice it when I wiped. Tonight I finally got a little bit of a flow but it is very thin and has an orange tint to it. It's also not very heavy at all. I did a 3rd test (-) and plan a 4th nxt week prior to Dr. appointment. I have been taking Adipex for weight loss and have lost 20lbs in in past 2 mo(reason for mult. tests). My current symptoms-nausea,tender (bf .), dizzines