Oaths and vows due to waswasa

Assalamualaikum, I have so much OCD . When I say anything while talking,while making dua and while reading namaz my mind makes lots of oath but I did not utter it verbally during saying but then I doubts whether I makes an oath verbally or not . This happens all the time . This is not in my control . I can't able to study due to this. Is kaffarah waajib on me for breaking this oath . Please tell . Do I suicide. I fear very much of allah and I do not want to go in hell. I hear that allah will not see his face who breaks an oath on the day of qayamah.