Tahaarat

Q: I performed fard ghusl. I performed the two fard of washing my whole body and putting water in my nose but before I rinsed my mouth, I drank a glass of water (to fulfill the obligation of gargling, as I was advised to drink a glass of water to fulfill the gargling) but then I forgot about rinsing my mouth. I rinsed my mouth the next day when I remembered but did not gargle as I had already drank water the day before it to suffice for gargling. So is the fard of washing the mouth now complete and my ghusl valid? 

Q: Are slugs najis? I find a lot of them inside and outside my home and their slime is difficult to avoid.

Q: If I already have wudhu, will I be rewarded for making another wudhu?

Q: I wasn’t sure if I had passed gas during salah, so as the hadith mentioned (not to stop prayer until a sound is heard or smell is detected) I stopped recitation for a moment and tried to detect a smell. I didnt smell anything and I resumed. Was this ok of me to do?

Q: Is istibraah only for males?

Q: I would like to know that after I made ghusl I realized that there was still some wax on my hand. Do I have to repeat the ghusl or just wash that portion of my hand?

Q: I had taken ghusl and washed my whole body, but I forgot to do wudhu and offered jumuah salaah. Is the ghusl sufficient for wudhu or will I have to repeat my prayer?

Q: If a woman or man bathed before their nikah and didn't know they had to rub their scalp but every strand of hair (atleast they thought) was wet would this mean the nikah would be invalid as ghusl was not done completely? What about a woman who bathed after her periods before her nikah and missed some parts of ghusl but thought she was cleans. Is nikah invalid?

What if she did ghusl like this for 4 or 5 months after nikah and did ghusl like this after periods and sex? Does nikah invalidate? What if any part of the ghusl was done incorrectly or missed what is the effect of nikah? Is it invalidated?

Q: In the wudhu, wet back side of neck is sunnah or farz?

Q: Through eating camel meat, will the wudu break according to the Hanafi mazhab?