TMI...

Took my daily morning walk today and came home and went to the bathroom and noticed my bowel movement was half bright green. Looking back to yesterday, the only vegetable I had was broccoli. I had my normal serving size as I normally do for lunch. Everything else I ate yesterday was typical and I hadn't yet ate food today. (A lot of articles said it could indicate food moving through too quickly) some articles said some women get this in early pregnancy even before BFP! I'm 4 days away from expected AF but have been nervous about jumping the gun and taking a test since all the other times I did it was negative and it just makes me so stressed to think if maybe it was still too early or if I'm really not pregnant. ... thoughts?! Anyone else experience this?