Anybody?

Just a little confused. Had very watery light pink spotting yesterday. Only a few times when I went to the bathroom. Also had a weird sharp pelvic pain on my left side yesterday morning that lasted about three seconds. Went shopping with my SO and almost passed out in the dressing room. Every went black and my face got very red. Luckily SO was in there with me to catch me. Was extremely hot last night when I went to bed and my SO had to keep an ice pack on my head. What's getting me is the watery pink spotting. I've never had it before. Are lunch today and it just didn't sit well with me. I have a daughter from a previous relationship and never had any pregnancy symptoms. Any advice ladies on what it could be? Idk if it helps but I supposedly ovulated the 13-19 of this month. And period is due some time this week. Thank you.