Brown period blood?

Hi! So I’ve been on Sprintec for 6 months now, periods have been regular and normal since I started, always either on time or 2 days early and last five days. The blood the first day is always red, like RED red how it’s supposed to be....but this morning I went to the bathroom and saw the red blood so I was like oh okay we’re starting this ok cool 2 days early no big deal...had to use the bathroom again a few minutes ago and I’m just spotting now....? And i know it sounds super weird but I used a q-tip to check if I’m still bleeding (just stuck it up real quick and took it out) and the blood up there is really dark in color.....doesn’t that only happen if you’re pregnant?? If I’m pregnant I’m going to panic because I’ve been religiously on the pill perfectly every single day for 6 months, and we use condone every time. The bathroom trips were only like 40 minutes apart so...what the heck. Should I be worried?? I’m worried. Or could it just be old blood?