Blocked Fallopian Tubes - Herbal Treatment?

Potentially if that is the formula that is correct for your underlying diagnosis (see “how to choose a formula” and “treating the cause vs. the symptoms” for how a practitioner would choose herbal approaches for a patient). In short, herbal formulas are not chosen by symptoms but by your underlying diagnosis in Chinese Medicine terms (i.e. not “blocked tubes”, but perhaps damp obstruction, or yin dryness, or liver qi stagnation, etc.).

Nuan Gong Yun Zi Wan is from the invigorate the blood main category and within the warm the menses and dispel blood stasis sub-category – so if your underlying issues are that of blood stagnation (which can lead to the issues you are describing) then, yes, that is a good formula for you. If your underlying issues are from another diagnosis that formula would vary between completely ineffective to mildly effective - to disruptive depending on what your actual diagnosis is.