The halal is clear, the haram is clear
إِنَّ الْحَلَالَ بَيِّنٌ، وَإِنَّ الْحَرَامَ بَيِّنٌ، وَبَيْنَهُمَا أُمُورٌ مُشْتَبِهَاتٌ لَا يَعْلَمُهُنَّ كَثِيرٌ مِنَ النَّاسِ
Inna-l-halala bayyin, wa inna-l-harama bayyin, wa baynahuma umurun mushtabihat la ya'lamuhunna kathirun mina-n-nas.
"Truly, what is lawful is clear and what is unlawful is clear, and between them are doubtful matters which many people do not know."
Narrated by Nu'man ibn Bashir. Sahih al-Bukhari 52, Sahih Muslim 1599 · Nawawi's Forty · #6
A short reflection
When in doubt, leave it. The one who avoids doubts protects his religion and honour.