Simone the ovultaion kits are great but ideally you need to know more or less when you ovulate to use them or it will be a costly process. You buy the kit which gives you x number of tests and you start testing about 4/5 days prior to estimated ovulation.
I personally think you should go with the flow (or lack of it

) for a month or two and see how it goes.
Can you give me a bit more info. When was the first day of your last bleed and how long do you think your cycle is more or less.
Spotting can occur with ovulation even without pain and it also occurs with implantation some times.
If you seriously need to know what is going on with your cycle you should ideally chart. This means taking your temp at the same time each morning when you wake. It is really important to do this or the temps will not be accurate and so you will not get a clear interpretation of your fertility. You would take the temp the minute you wake up before sitting up or talking or drinking anything --- or Kissing your man. Record the temp daily and then you can plot it on a graph. Your cycle is make up of two cycles which are divided by ovulation. (if it occurs that is). the first phase is the follicular phase where the follicle containing your egg develops for ovulation. then you ovulate which brings the second phase the luteal phase. This is where that follicle that released the egg becomes corpus luteum which produces progesterone to support the early pregnancy. If no fertilisation or implantation takes place this breaks down, progesterone drops which causes your period to come.
So why take your temp. well the first phase causes lower temps then the temp dips (normally) at ovulation and rises sharply after ovulation. the temp then remains higher than all previous temps in the follicular phase for at least 10 days. this is a good, normal cycle.
Here is a chart to use to plot your temps.
www.babyhopes.com/articles/bbt-chart.html
the chart will not tell you when you are going to ovulate but it will give you an indication of what your cycle looks like and if you are ovlating.
Shout if you need help or email me.