Aw, first time kaya medyo scary talaga! Honestly, ang period natin changes throughout our lives, sometimes it's heavy, sometimes light, sometimes the color is different depending sa hormones, hydration, stress, lahat ng yan. But since this is your first time seeing it like this at nag-panic ka, I think mas okay kung i-check mo muna sa doctor lang para ma-ease your mind, kaya? One of my friends had something similar at sabi lang ng OB niya, totally normal lang, pero feel better siya after getting checked. Don't stress too much, usually ito lang hormonal changes, lalo na if first time mo, pero peace of mind mo mas importante.