Tahaarat

Q: I wanted to ask if one passed gas but feels as if some stool might have almost passed and touched the underwear what should one do? I have started to ignore these thoughts and now normally don't pay attention to these doubts. But today while I was in my mum's room I felt as if stool might have touched my underwear while passing gas. But I didn't do much and layer in her bed and passed gas some more. But then the thoughts started to make me uncomfortable so I got up and just as I was about to leave the room is passed gas again - this time bigger one. I went to check my underwear for wetness or stain. I ran my hands on error the underwear but found nothing the first couple of times but then I felt some wetness (not dripping consistency, it was very very light). Now I'm not sure if this was my waswasa making me believe that there is something or if it was actually there. I was wearing black underwear so it was difficult to be sure. But then I shed some light onto the part where I felt wetness and I saw that the area was a bit darker. But then again, because it was silk it normally leaves a mark when I sit for long, like a dent. No stool but it could have been moisture after gas. But what I don't understand is that why I didn't feel this wetness before? I changed my clothes. I was also wearing dark colored tights. They were also silk. Now my mum was furious because she thought I must have made her bed napak too. I'm. Not sure if the wetness transferred onto the bed as it was too little. I'm not even sure if the moisture (if it was real and not just my imagination) was released when I passed gas in bed or while I was standing. I think it must be while I was standing since it was a bigger and more open wind I had released. When I came down I wasn't sure what to do so I just came and layed in her bed again without cleaning the area or the blanket. I had taken shower but dried myself too so I don't think the najasat (if on bed, would have dried out as I took at least 30 mins to come down) had transferred onto my new clothes which were dry as well. But my mum made me clean the area and now I'm not sure if my new clothes are also napak or not? Am I napak? Was the bed napak? Are my clothes napak. I did clean her bed and the blanket where I think najasat could have transferred as I'm not sure which areas were affected. Do I ignore these thoughts in this circumstance and the similar ones in the future too?