How can a woman know who has bewitched her so she can avoid them and dispel doubts, especially since she suffers from excessive suspicion towards those around her after she confirmed she was afflicted by a potion spell that caused separation between her and her husband?

We advise you to think good of Allah, to truly rely on Him, and to continue treatment by observing the prescribed remembrances (adhkar), reciting Surat Al-Baqarah, performing legal ruqyah, and making abundant supplication (du'a). All of this should be done with contemplation and certainty. As for being concerned with identifying the sorcerer, there is no benefit in that. Avoid thinking ill of anyone whose outward appearance is sound. Strive to rectify any discord between you and your husband, seeking help from wise family members.