BFP or false positive?

​this is my third month of clomid (day 3-7) and I went in for a follicle scan on day 12. Dr said it looked like I either already ovulated or had a follicle left over from last month. Had dull cramping all day on day 14 then on day 15 I had heavy breakthrough bleeding but it happened all at once, not enough to keep a tampon in. Today, day 18 I got a positive pregnancy test? So confused. I'll take another test in the morning and call the doctor but it seems like a falso positive, right? It was a pink-dye test. :/