First of all relax, take a deep breath.
The way you are speaking, it sounds like as if you haven't even gone through 5 years+ of medical, of which 3 years were clinical based. BUT YOU HAVE. You worked hard and now you made it to FY1. A lot of people don't make it this far trust me!
You need to take some steps to ensure what needs to be done.
You have just started FY1 - relax - most of your colleagues feel the same, its not just you. They may just not show it in the workplace but inside theyre scared and terrified. But dont worry its part of the job. You have to learn by testing the waters & making small mistakes.
Here are some pro-active steps you can take to fill in the gaps.
1) Carry a mini A5 note pad with you at work, all the time. On here you will write down the jobs you need to do. You will find time to write everything. Print out the list of patients from the computer and carry this with you aswell, so you can write notes on this & add and remove info about patients that is necessary. When listing jobs in your note pad, you need to measure by importance and prioritise. You will only realise which jobs are more significant/important by communication so thats step 2. On the list of patients paper, you can write all info on it eg. when blood was taken last, when last stool was etc. You seem to need that info so write it like your life depends on it. It doesn't need to be neat. Write it in a form, which you can understand.
2) Find a FY1 Buddy or 2 from the same ward/neighbouring wards., everyone does. All the FY1 generally work together cause youre all noobies - so dont worry. All of you will need to work together anyways so make friends now! For example, everyone needs to eat lunch, "so maybe one day tell one of them hey do you wanna grab lunch, its on me" - thats when you go to the hospital cafeteria. Communicate with everyone, FY1, FY2, Senior House officers (SH1), Registrar, consultant & nurses...they all have experience. Communicate and learn off them.
3) Every few hours, take 3-5 mins out to relax somewhere quiet, drink water. And restart. Break this long exhausting shift into mini shifts, 4-5 parts/chunks & have mini breaks in between to console yourself. This is a new job, this is the real deal & you are good enough. Sometimes we seem weaker, but we have all the skills. You just need to take extra measures to catch up so you can excel in your own unique way.
4) Try get an older mentor who has done FY1, even if you need to pay them for their time. Find someone who is willing to give you guidance on what jobs to do or what patients tend to commonly need etc when they have a certain problem. Most problems on ward are common, they have many common procedures. Find them, search them, record them.
Listen carefully, its going to be tough for a few months. The time is going to fly. You need to get through this and you will. Do what you need to do, you've got this far. Exercise whenever you can outside of work hours, even for 30 minutes. Love football? play some football with friends, Love Badminton? get a friend and play. You need to exercise & have fun too, if you want to get through this busy period of learning, research & being active on ward. Have parents? gift them flowers.
You are going to make this work.