Factors that break and don't break the fast

Q: Frequently, when going in sajdah, the fabric of my headscarf or the prayer mat ends up on my lips or in my mouth. This is an issue when I’m fasting. I don’t know if anything like microfibers or small hairs have entered my mouth. Today this happened during salah but I couldn’t feel anything in my mouth after it occurred so I assumed I could swallow as usual.

1. Was this correct?

2. If this happens during salah, and I feel something in my mouth after, do I have to spit?

3. If this happens in salah or near the end of it, do I have to check in a mirror afterwards to see if anything inside my mouth?

Q: I wasnt sure if lip balm went into my mouth during fasting so I closed my lips and licked the inside of my mouth to try and taste it. I believed I swallowed in attempt to figure this out. I only realised after that I shouldn't have swallowed - although, I didnt taste any lip balm so, is mt fast valid?

Q: The moisture left on my lips from washing my face/mouth during wudu, is this safe to be licked and ingested when fasting? Usually after I wiped my lips in wudu, I have to spit and then let my lips air dry and/or wipe with a tissue until dry. Today after wudu, the majority of my lips were dry but in the corner of my lips I felt a coolness, which may indicate that there is still moisture from wudu left. I licked that area. So now I’m just wondering if my fast is valid. 

Q: Does the inhaling of the fragrant mist/steam that is emitted by an aroma diffuser break the fast?

Q: What to do if a woman, while fasting, inserts a dry tissue in her private part. Tissue was dry but private area is wet so it might happen that while inserting tissue wetness goes in. Does she need to repeat all those fasting?

Q: What is the ruling for a fasting woman who inserts portion of the tissue into the private part for istinjaa? Will her fast break through this?

Q: When sitting down during salah, there is a build up of pressure in my vagina - I have a sensational feeling (involuntarily without thinking of sexual thoughts) is my fast invalid? I don't know if there was any emission.

Q: Someone burps and feels like reflux will reach his mouth but he swollows before it can reach, does the fast break?

Q: In the state of Ramadan should I avoid gargle and sniff water in to the nose in major impurity?

Q: A person forgetfully drinks water in Ramadan. While drinking water he suddenly remembers that he is fasting. He stops drinking water but while he was remembering that he is fasting he might have drank a little water. That means he drinks a little water remembering that he is fasting, but he did not have any intention to break the fast. He then continues the rest of the day fasting. Is his fasting valid?