I've never experienced this

Magaly
Sooooo me &SO broke up like 3 weeks ago but we saw eacother yesterday. &&the feelings were still there that we had sex. We decided to get back together so it's all good. 
​BUT
​today I went to the rest room & it's always been a habit to look at the toilet when I'm about to flush but today I saw like I don't want to say clot because it wasn't period but it was white looking cumishh. I saw it twice &im like "what the heck" any suggestions on what it can be? o:
​Cause I've never seen that before.