Low potassium

I have low potassium that I can't seem to get away from, I usually take a pill for & it straightened it's self out. This time I have had a lot of complications like nothing sounds good to eat, sleeping, very tired, passing out feeling, muscle spasms like crazy, urine smelling weird, heart not beating the way it should, plus a few other things going on. I have not had some of the symptoms I'm experiencing in my past, are they normal? When should I seek medical attention? I just know I don't feel like I usually do when my potassium is low. Any answers would be Greatly Appreciated Thank You For Any Advice!!