I'm a fairly healthy 18 yr old who has been on ortho-lo for almost a year. My next period is about a week away. For the past 3 weeks I've been on Zoloft and 2 weeks ago I was on Amoxicillin for a few days. During this time I have been having sex without a condom, although, the "pull out" method was used. About 4 days ago I had pain during urination and frequent urination. I initially thought I had a UTI until the pain stopped the next day. In the middle of all of this I also began to bleed irregulary. I had a brownish discharge like bleeding that went pinkish. The bleeding is enough for a panty liner at times and not enough to notice until I wipe at other times. I've also been having backpain, nausea, cramps, and extreme bloating or abdominal swelling.
Could I be pregnant or could this be something else?
Thanks.