You have to ask yourself why is shaitan focusing on me with this waswas? Like what's his goal
He's trying to make you miserable so you leave wudhoo and salah
Don't let him win. Make the sunnah wudhoo (it's fardh to wash once but if you do the three times washing even if you miss something on one of the washes you know you are covered because one of the other two times got it) then after wudhoo ignore any thought that comes into your head saying you missed a spot. This is shaitan trying to make you miserable so you leave salah. Just recite audho billahi minash shaitaanir raheem and ignore it. Consciously ignore it
Then go pray
Unless you are 100% sure you broke your wudhoo (and I mean without a shadow of a doubt no ifs or maybes) keep praying, Allah is forgiving and merciful you are striving to make salah for his sake and you are dealing with waswas inshaAllah if there's any errors inshaAllah you will be forgiven. Just seek forgiveness and khalas
You have to fight this sister don't let the shaitan win. You know what he wants so do the opposite
Lastly make dua. Make dua Allah cures you from this waswas. Even if you see no progress keep making dua. InshaAllah sooner or later it will be answered
Hope this helps