After having 2 children (from previous relationship) the youngest being 8 1/2 me and my partner have decided to have a child between us. I can't believe though that I seem to have forgotten everything about being pregnant and how I felt at what stage. Although my children weren't planned, I love them very much but this time I am planning to become pregnant and am unsure of things to keep an eye on...
Can anyone tell me please how early I may feel sick (both pregnancies I had horrendous sickness) and how early I may feel thoroughly exhausted. Are there any signs to look out for before the obvious missed period?

I started having sore breast a couple of days before I missed my period, and mood swings I started having very early even before I had any idea that I was pregnant.
Good luck on your journey

Get the "What to expect while you are expecting" book. It is a great resource. Explains what you are feeling and why.

With this pregnancy, fatigue and headaches started around 3 weeks, breast soreness around 4 weeks, morning sickness around 4 weeks.