I have been taking Loestrin 24 FE for 8 months now. This month, I had unprotected sex with my boyfriend and the next day I immediately started my period which is a week and a half early. It lasted for only 5 days. My period usually lasts for 10 days and doesn't usually start until 10 days before I start my new Loestrin pill cycle. After the five days my period ended two days later I noticed some spotting which was light pink to brownish. My period should've started 5 days ago. Typically when my period would start early it would last until my pill cycle was finished. So if I started my period started 2 weeks early I'd be on my period for 3 weeks or until my current pill cycle finished. I have been experiencing minor back pain and headaches and indigestion after almost every meal. Could I be pregnant?