How do u feel after a heart attack. like when u wake up the next day. how do u feel? would u have weakness? head pressure? brain fog?

Heart attack: You could feel fine the next am or you could be dead. You could feel virtually anything in between. If you get to medical care quickly with the heart attack you have a good chance of feeling pretty well pretty rapidly depending on many factors.

Full range: From normal to dead and any variety between, depends on pre mi status and degree if damage and treatments.