What do i do .. 😵🤗

So i bleed for like alomst 3 weeks back in September and now its November and im like 2 weeks late on my period and that hasn't happened in a long time and im concerned i took a pregnancy test came out negative so i thought then i come home from work and the line is like flipped idk but im very confused imma take one again here in the next few hours after i get some sleep, but would someone looks at this and just give me an opinion or something .. anything will help at this point my anxiety is threw the roof