Salam O Alikum
Subhan allah,you remind me of the old me which was like 4 or 3 months ago,i was having so much wiswas at a point I started going through the basics of islam LOL,and subhan allah the same thoughts were going through my head,but what I see is,you're a good muslim,and idk why but you're really scared from believing others in Allah,which shows how much submissive you are to Allah,i actually had the same thought but not exact,i was wondering "What if I am believing in allah,but then I am not?" so I went crazy on google and then I came across this which warmed up my heart so much,"He who is worried about wither he is a munafiq or not,he's not" a munafiq is a muslim who doesn't believe in god anymore,stops praying (I prayed and everything hamdillah I only thoughts that allah doesn't exist,but then again I go back to the miracles of the quran,and started having thoughts that prophet mohammed (pbuh) didn't exist "Ikr? stupid thoughts lol" but then,i watched a lot of Islamic videos,and the most common thing that was said throughout all the Islamic scholars was "It's how strong you will hold on to the book of Allah" and it just hit me,i didn't even read the quran once! so I started going through it and I began reading it,subhan allah,the first verse touched me already,like it left me speechless,i wanted answers for my questions and I got them from reading the first page of the quran,Allahu Akbar,brother I would LOVE to help you out,as for your doubts,you can ask me what you're having doubts for cuz I wanna help you brother,and also I remember having tears down my cheeks saying "O allah don't make one of the ahtiests and polytheists" but the first thing I recommend you to do is,read the quran,YOU have to bro,its the guidance for life,and also know that satan LOVES to trick very good muslims like you,and yes you are a very good muslim mashallah,so just pretend you're having no bad thoughts,if you're having them,ignore them,read or listen to the quran,the shaytan might get sick listening to the beautiful powerful words of Allah.So brother,if you have any question,just ask,i understand Islam a lot and I wanna help you so bad so that allah can guide you,ameen <3
Wa Assalamo Alikum Wa Rahtumallahi' wa barakato