Imaan and Nikkah

For the past 10 years ….while performing my fard salah I always am certain i am not performing my fard acts in my salah while performing my salah …. I have trouble with my fast as I am certain it’s breaking while I am fasting ……whn making wudhu Ifeel certain I am leaving fard parts of my body left dry …I am certain my salah, fast, wudhu is null and void on many occasions …..

Everything in the situations mentioned below occurs to me sometimes
Situation 1 :
Firstly
I am certain I am uttering statements of kufr ( that take me out of islam ,with the intention of committing kufr in my mind and heart) .A while after stating the statements that take me out of the fold of islam …(with the intention of comitting kufr in my mind and heart )…., I get this intense fear and worry that I am out of the fold of islam ….. So I read my shahada in abundance
Situation 2:
Sometimes ….I am certain I am committing actions of kufr that take me out of islam ( with the intention of committing kufr in my mind and heart) .However, after I commit the actions of kufr with the intention of committing kufr in my mind and heart …I get this worry and fear that I am out of the fold of islam
…so I read my shahada in abundance

1) I posed the question again as it is unclear if my imaan was lost based on the situations mentioned above as these situations occur to me sometimes
2)is my nikkah still valid as I experience all of the above situations sometimes ( more than 15 times each and more ) while married ?

Maaf for asking again ….just needed clarity but jnsha -Allah I will now be clear

Jazak -Allah
Request for du’aas