Dought & clear, - Insinuating Whispers About Apostacy.

Many years ago (15 years) I read that apostatizing from Islam is one
of the things that invalidates wudoo'(ablution) and that stuck in my
mind. Every time I want to do wudoo' I feel that I am a non-Muslim,
and I repeat wudoo' more than once. It may be a kind of waswaas
(whispering from the shaytaan) but I really felt as if I was a
non-Muslim. I would repeat the Shahaadatayn (testimony of faith) but
there was a feeling inside that I didn't believe it. But I would think
about the meaning and I found that I believed in it, but the feeling
that I am a non-Muslim will not go away. I weep and I pray to Allah to
heal me from what has befallen me.
I used to refuse to get married for fear of disbelief, lest it
invalidate the marriage.
Despite all that, I still pray regularly, read Quran and listen to
lectures. I know that the way to treat this waswaas is not to pay any
attention to it, but I was weak and I paid attention to it. I know
that I am wrong. What should I do?
Praise be to Allah.
We ask Allah to heal you and make you well, and to replace your
waswaas with peace of mind and certain faith.
You should realize that what has befallen you is a great test, and if
you bear it with patience and seek reward with Allah for it, you will
attain a great deal of good, by Allah's leave. The Prophet (peace and
blessings of Allah be upon him) said: "Calamity will continue to
befall the believing man and the believing woman with regard to
themselves, their children and their wealth, until they meet Allah
with no sins on them." al-Tirmidhi (2399).
Al-Tirmidhi (2396) and Ibn Maajah (4031) narrated from Anas (may Allah
be pleased with him) that the Prophet (peace and blessings of Allah be
upon him) said: "The greatest reward comes with the greatest trial.
When Allah loves a people He tests them. Whoever accepts that wins His
pleasure but whoever is discontent with that earns His wrath." So
receive the glad tidings of a great reward, in sha Allah, and remember
that what you feel in yourself will not harm you, so long as you love
Allah and His Messenger (peace and blessings of Allah be upon him) and
His religion, and you hate disbelief and its people.
There follows some advice with which we ask Allah to benefit you:
1 – You should be certain that this waswaas comes from the shaytaan
and is not real. How can you be a non-Muslim when you pray regularly,
read Quran and listen to useful lectures?
2 – You should remember Allah a great deal (dhikr), so that the
shaytaan, who is the source of this waswaas, will go away from you.
The Prophet (peace and blessings of Allah be upon him) said: "… and He
(Allah) has commanded you to remember Allah, and the likeness of that
is a man who was being pursued swiftly by the enemy, until he reached
a strong fortress in which he found protection; similarly a man cannot
find protection from the Shaytaan except by remembering Allah."
3 – You know that the way to treat this waswaas is to ignore it, so
continue to do that.
4 – You should fill your spare time with things that will benefit you,
so that you will not have time to think about this waswaas.
5 – You should pray to Allah a great deal and turn to Him, and seek
refuge with Him. Look for the times when du'as are answered, such as
the last third of the night and when prostrating.
We ask Allah to heal you and take away this evil from you.
And Allah knows best.