Hello , I'm making this  post to ask for opinions and advice, I'm a 21 year old male and I feel my sense of doubt is killing me, first off what do I mean by doubt to me it means the following:

When I finish a test or hand in a paper : I constantly question myself did I forget that or did I make a mistake there and I didn't notice it, even though I revised the paper multiple times.

When I have to make a call to confirm something, I ask him/her to confirm the answer over and over again, it can get annoying but I have to do it else I'm not sure and I can rest easy ,and even then I'm posing the question to myself (what if he's lying to me ? or what if he is wrong ?) which leads to making different phone calls at different times of the day.

when I have to fill out a form I go over the info I wrote many many many times ,and I sometime even take a picture just so later when I start doubting I can look at it and confirm it.

When I close my door ,I try to open it multiple times just to make sure it is actually closed ,and even then sometimes when I'm on the buss I start asking myself (did I actually close it).

when  I Weigh something like fruits or vegetables or even myself I do it many times just so I am sure ,and sometimes when I am on my way to the checkout I sometimes go back and weigh it again.

When someone (colleague ,classmate , family member) says something about me or asks about simple information about myself I keep pondering over it and questioning the intent and purpose behind it, (is it to mock ? to ridicule ? does he want to ask for something ?) simple questions like (how old are you ?,where do you live? , what do you do ? ),or when someone shows me kindness I question the intent behind it (why did he do it ?)etc.

you might think this is a little overboard but still it is a part of human nature but no this sense of doubt   consumes me and governs every part of my life every day every hour ,I'm doubting especially when I have a problem in my life all I can do is think about it every day ,hour , second I can 't relax or ease myself because I'm always doubting always thinking what if this or that happens .

this causes to become both frustrated and angry at nothing but the tricks and pranks my own mind is playing on me ,it is as if someone is constantly filling my ear with questions and uncertainty.

I used to be pretty religious  6 years ago but I had to quit because I just couldn't bear the constant questioning of myself : what if I did that wrong ? is my prayer not accepted ? what about that sin am I going to hell because of it ? it lead me to repeating everything over and over and over again to the point where I sometimes felt like crying and screaming yet no one is causing this but me.

so to any of you who are reading this post is this normal and I am just being a drama queen if not please give me some advice thank you nonetheless.