How long does implantation bleeding last?

Jas

Ive read on different sites that it usually lasts from a couple hours to 2 days. Well im 5 weeks and have been having brown discharge for about 4 days now. Should i be worried? Its not constant it just comes out here and there but doesn’t even make it to my panties i just feel it and when i go to wipe its there and sometimes just a spec other times a bit more. I dont know if this is an issue or should i just relax and give it time to go away.