Spotting-scary

My period starting exactly 2 weeks ago yesterday. Yesterday I went to the restroom and noticed I was spotting. It lasted until I went to the restroom a few hours later and then went away. Around 8 pm today I started spotting again and it hasn't gone away..it's a little heavier than yesterday. We are trying to get pregnant btw. I am wondering if this is implantation bleeding or maybe ovulation spotting, has anyone experienced this?