Dark brown discharge for almost 2 weeks.

Ashton • Hyperthyroidism
This is really starting to upset me. I thought a couple weeks ago I started my cycle and it was really light. BECAUSE. When I saw this dark brown spot I thought my period was coming on. So get this magic shit. I put a pad on and it looks like a decent amount - mind you this is BLACK. Next day, same thing. That night I forget to wear a pad - NOTHING. Next day, NOTHING. It's like there's more when I wear a pad and none when I don't. So I wore one to work the next day. Decent amount again. Makes no sense.
So tonight my boyfriend came over and I went to go get a shower and no surprise, there was a tiny Bit of brown discharge. So I felt myself and it's sticky and I know this is gross to smell it but it smells almost sweet. So I hopped in the shower and I'm thinking - it was only that tiny bit over the span of the entire day. It'll be no problem if me and my boyfriend get it on as soon as I get out. 
So we do. He picks out what I wear. I get in bed with him. He pulls them aside and starts oral. Then he goes to do it again and sees it on my panties and has this horrified look on his face and said there's dried up blood and I thought there was a lot so I go to the bathroom and it's just a tiny bit. Like pinky nail size. And I changed and we left the whole thing alone tonight. It just sucks finding opportunities and nasty lookin discharge ruins everything. The only thing that I've done different is BC. I've been on it for almost 3 weeks with no problems.
Is there anything I can do?