I was told that the reason tooth was painful sometimes was that since it was so deep and only partially visible, it was impossible to clean it properly and it got chronic mild inflammation that surged when my immune system was occupied elsewhere.
It took hour to get it out, including snipping few pieces of lower jaw that were in the way and few more afterwards, since hole had sharp edges that would cut through gums in future. I got antibiotics, information pamphlet and was send home to get stitches out in 8 days.
After few days, I developed dry socket and somehow ripped out one of the stitches. Since it was a weekend, I went to emergency and they filled dry socket with some special seaweed mixed with herbs. It was great, numbed pain and covered the spot. Next day pain came back with a punch and I found out that seaweed is gone. It probably fell out during night and I swallowed it. Today I went to doctor that took the tooth out to give me something and advice me what to do. She told me to tough it out because it will take about three weeks until dry socket heals, put some small drainage in and told me to come back tomorrow so we can remove stitches... Still on painkillers and current news is that antibiotics probably gave me oral thrush because everything I ate today tasted like fungus filled old bread and my tongue is white coated.