they suck and can go burn in hell.
legit mine are never normal, or on time, sometimes i do nothing but spot, sometimes i bleed for 40 days and 40 nights and flood the entire world... i rarely get cramps thankfully but when i do they're like... killer cramps... like keeling over in pain, unable to move kind.
Dude, get on some bc pill/other methods that sounds very not normal.