Haiz, Istihaazah & Nifaas

Q: I need assistance in calculating which days in cycle are considered isthihaza and which days are considered haidh. My normal habit is tuhr of 18 days, following a haidh of 10 days. Diary for this month follows:

Day 11-spotting began

Day 14-bleeding started

Currently on day 17 and still bleeding

Please advise,really confused with regards to namaaz and other ibadath. 

Q: Is one off bleeding after intercourse regarded as istihaazah?

Q: Can a root canal and capping of teeth be done while a woman is in her menses. What is the ruling in this matter? Or she has to fix the tooth cap after taking a bath from menses?

Q: I want to know about menstruation.

1. Should a girl do prayers or not?
2. If her menses is over while she is in Ramadhaan but however she miss sheri, should the one abstain from drinking and eating or she can continue to eat because she missed out sheri due to her menses.
3. How would I know that it really is my menses because sometimes it is confusing and I myself do not know whether it menses or not. Therefore this creates doubt in myself and I do not know whether to do salaah or not?

Q: 

1. A person who is in haidh, can she write the English translation of the Quran?

2. When she is teaching younger children can she read the words in the ahsanul qawaaid?

Q: One of my friends want to ask about a problem related to her salaah. Her usual periods have always been 7 days max. But now she is using contraceptive pills and due to pills the periods prolonged to 10 days or more (i.e after 7 days not proper bleeding or brown discharge but yellowish or little greenish without becoming clear). She starts salah after 10 days as she had read that 10 days are the max limit. Should she start salaah after 7 days or 10 days as its clearly due to the medication not natural because if she leaves the pill it goes back to 7 days.

Q: My wife completed her 40 days after birth of our baby girl last week and had ghusl. Yesterday (after 6 days from 40 days) we had relations and then both of us had ghusl. She spotted some very light bleeding after couple of hours of ghusal so should she do another ghusal or just wudhu please? 

Q: If a ladies menstrual cycle is 7 days so she goes for a ghusl on the 7th day because she is clear but on the 9th day she has relations with
her husband and after making ghusl she has some pinkish to red discharge what is the ruling should she go for ghusl again and will it be  regarded as part of her haidh?

Q: I recently get my menses 2 or 3 times a month, do I regard the others as a period as well if I already had my menses for the month / referring to Ramadhaan. can I fast or not?

Q: Alhamdulillah, we have a 2 year old child. My wife had a Miscarriage almost 10 months back, now she is facing menses day problem so need your kind advise for Ramadan fasting. 

1. Two months back, she found little spot of dirty water (or may be blood) for first 5-6 days and then she faced full menses for another 5-6 days and then again little spot of dirty water for 5-6 days so the total duration was 15-17 days. She wasn’t performing any sort of religious obligation in that duration.
2. Now the same case is going to start, she is finding little spot of dirty water for last 2 days, please let us know if she observe fasting if not then when she can get started.