NEVER use acid core solder on electrical components. The acid will stick around and continue to eat into components and wiring well after the soldering job is over. Resin core solder can be had in various quantities, but I buy the one pound roll for around $12-15 which will be a lifetime supply for most folks. I use Kester brand 44 Resin Core solder in the .031 diameter size. This is about the size of mechanical pencil lead and works quite well for what you will be doing.
Symptoms and diagnosis [edit]. Mittelschmerz is characterized by lower abdominal and pelvic pain that occurs roughly midway through a woman's menstrual cycle. The pain can appear suddenly and usually subsides within hours, although it may sometimes last two or three days. In some cases it can last up to the following cycle.
In brief: A few days. Pain related directly to ovulation, sometimes called mittelschmerz, ' is usually only a few days. Obviously there is personal variability, but one or two days is very common. There can be pain indirectly related to ovulation or not related at all that might make pain go on longer. I suggest if pain lasts longer than about 4 days checking with a doctor may be helpful.