When is necessary 2 see a therapist? I go thru cycles where I peak feel super motivated/awesome & bottom feel depressed/lazy every 3-4 days over &over

Now is the time. It is possible that you are having a " mood swing " disorder which may be a Bipolar condition. Or you may have a depression disorder which can be biological in nature or may be caused by underlying conflicts. The treatment may be medication, therapy or both. You should have a psychiatric consultation. Treatment works.