Hi, I've been having a lot of problems with my body lately and am quite frankly worried. Well, to start off , I'm taking this medicine called methylphenidate, its substituted for concerta. And, every time I take it it obviously helps me to focus more, but, it also causes headaches.. Really bad ones. And, I don't usually feel like eating when I take them also. I feel bloated and I can't eat or anything and also, I noticed that whenever I'm on my phone and messaging someone when I'm on the medicine, I always check my phone constantly, like obsessively , and I can't put my phone down. And , on days like this I will feel really dull and lifeless, and Ill be bored and walk around with nothing on my mind like a robot.. And, right now I feel like this because the medicine is still active right now.. I don't know how to stop this. Another problem I have, when I'm off of my medication , well I don't know how to word these problems they sound weird and unusual.. 1. Well, I get irritated by loud noises. Like, angry. When someone screams or makes a loud noise with an object and its sudden I will get this short one second feeling of aggression , and I hate when that happens because it makes my heart thump faster and it makes me stressed. I don't know if that's normal but yeah.. Another, whenever I am going to bed, or I'm just really comfortable , I get these small spikes of pain, like usually on my legs or my torso, sometimes on my hands. It feels like bugs are biting me, but there's nothing there and I know they aren't bugs, it must be something to do with my nerves.. And also, I will get hot flashes constantly on my back.. And, I will have back pain a lot. My lower back, also, I have headaches in the morning. Like EVERY morning.. I don't know why.. I have many more of these problems.. I just have to think of them.. Cause, they come and go and sometimes I forget about them , this post sounds really weird I bet, but hopefully a doctor can help. I feel like these problems I'm having are all symptoms of a really big problem I'm having. Like a disease or something, and also, I feel like all of these problems are in my head? .. Because they are all problems that are internal , like inside my body, there is no evidence of it on my skin, and the headaches and stuff.. It feels like there's something wrong inside my body.. Thank you anyone that can help