Someone please help me i cant take it anymore

I get this weird tiredness sometimes, its differeny from normal tiredness its like my body (including my brain) has no energy my brain is like asleep ?? I keep yawning and yawing or my mind just turns off i feel like off balanced like im just gonna zome out sometimes its like stars in my eyes ?? And my arms and legs are like burning ??? I cant blink right or concentrate right at all, i started saying stuff out of the blue cuz of the confusion, its like nothing makes sense when this tiredness comes, I don't know what is this, i have really bad health anxiety please help me its taking over my life, i want to be normal again

Must see the Doc. If you have already done it then have a second opinion

I already have, I have done blood and vitamin d test and they turned out fine