The importance of wearing a topi

Q: I had always been taught that the topi is the crown of a believer and part of the Sunnah attire. However, I was recently told by a close friend that the topi is not part of the Sunnah attire and has no basis in Deen. It was merely worn in the time of Rasulullah (Sallallahu Alayhi Wasallam) and the Sahaabah (Radhiyallahu Anhum) as a traditional dress. Is this true? Similarly, I would like to know whether the Sahaabah (Radhiyallahu Anhum) wore the topi at the time of Salaah.

Discharge from the private part

Q: I suffer from severe OCD. I constantly think I am napaak and worry about my prayer not being accepted due to it. So I'm constantly changing my clothes and doing ghusal. I know that normal vaginal discharge only breaks wudhu and that you only have to do ghusl if you have intercourse, wet dream, or orgasm. But sometimes I get very confused. Sometimes I will randomly feel tingling and feel some discharge and will be confused as to whether or not I have to perform ghusal because I don't think it was an orgasm because I didn't feel weak after, or fulfilled, or pleasure or anything like that. It just happens and I get very scared because I think I will have to do ghusal again because this happens frequently and at random times I can't control. Please help me. I am constantly obsessing over this. In this case do I need to perform ghusl or just wudu?

Vanilla extract

Q: I want to know if vanilla extract ingredient is halaal. I heard vanilla is made from alcohol. So if this is true then can we consume ice creams or other things that have vanilla as ingredient.

Nifaas

Q: A sister experienced nifaas for 38 days after her second child, had 7 days of tuhr and began bleeding again. Nifaas for her first child had been over 40 days. When will she begin counting 15 days and should she repeat her ghusl?