Is there a rule against 3rd baby shower?

Yadira • Rhianna👧Christian👦Noah👶
I've had a shower for my first 2 but they were 7 years apart and had a girl first then a boy. My son is 2 and I'm expecting another boy. My best friend wants to throw me a shower but I feel like I just had one. Am I just feeling weird or is there a "rule" against having a 3rd baby shower?