Motility, joint, twitching & sinus issues, sharp pain near sternum

Off and on since October last year, I’ve been having chest pains or kind of a sharp pain maybe near my sternum area. This year and more recently, it hasn’t really felt like chest pain but maybe a sharp pain near my sternum area. When I feel that way, it feels like it’s in the same area on my back as it is on my front side. I’ve felt like I’ve been going through cycles since October, where I’ll feel the pain and it’ll last maybe 3 days, and then it kind of goes away or I don’t notice it. It seems like I’ll go maybe for around 2 weeks-maybe a month or few months, and then it’s come back. Sometimes when I’ve felt the pain, it’s given me the urge to have a bowel movement and I feel uncomfortable and like I need to get things out. Sometimes I’ve also had feelings of fullness near my sternum/maybe stomach, and it almost feels like somethings there. I’ve wondered if it could be a hernia, but I don’t know.

I’ve also been constipated/have felt like im not fully emptying since fall 2020. I’m going to the bathroom and having decent size bowel movements half the time or more, but I feel like I have some kind of blockage or like something’s preventing me from feeling like I fully emptied. At times I’ve wondered if I’m just constipated and I haven’t dealt with it, but I’ve been going through cycles where I’ll go consistently for a while and feel like I’m getting things out, and then feel like I need to go more but it’s too hard to get out on my own or it would hurt too much. Sometimes my mouth has felt watery too, when I feel like I need to have a bowel movement but it seems like nothing would come out.

This morning not long after waking up, I started feeling the pain somewhat near my sternum. I had a decent sized bowel movement, and then later I felt like the pain or discomfort was giving me the urge to go to the bathroom again. I went through that a couple times and went decent amounts, but I’m still feeling like I need to go more but I can’t get it out by pushing.

I’ve also had sinus pressure for at least a year, and sometimes my upper nose feels like there’s pressure and sometimes stuffed. I’ve wondered if that’s connected to my bowels and everything going on. Sometimes when my nose has felt stuffed, I feel worried like I don’t know if something going on with my bowels is causing a blockage somewhere in my body.

Sometimes I’ve also had kind of like a pinching feeling in my joints, like in the area between my lower and upper arm. Sometimes I’ve had weird twitches too, like in my leg or near my pant pocket.

What could be causing this? I have a doctor’s appointment next month.