Very late , don’t wanna mix symptoms

So I’m now 22 days late on my period , i took a test on the 18th day I was late . It came out negative, but I still don’t get my period. I’ve had pregnancy scares before but I had never missed my period the whole month . My periods are usually irregular but have never not shown up in the whole month. I was supposed to get my period the 18th of last month. Symptoms I’ve been feeling have me confused and I don’t wanna seem crazy ! I’ve been super irritable with my boyfriend. Anything he does saids I find annoying and an arguement for. I’m super sensitive to the point he spoke to me in a different tone at the movies and I cried . I cry for anything lately , my nipples started hurting today and I noticed the stuck out although they had no reason to, I had this weird metallic taste one day I tasted shrimp and I had thought it was the shrimp I’d tasted but it’s still had a metallic taste so I didn’t eat any of it after . I then searched why I had tasted metallicy bc I had never tasted anything like it before .i get constipated then I’m not it goes back and forth . It’s just small things I’ve never felt and experienced with other pregnancy scares and my test was negative so I’m very confused . SOMEONE HELP !