Hi,
If you have no nausea just be grateful, lol! Not everyone suffers and it had no bearing on how 'safe' or otherwise your pregnancy is. I found the ms kicked in at about 7 weeks so you may still get it. Some ladies have every symptom in the book and others sail through with nothing so I really wouldn't worry.
If you are dizzy it may be low blood sugar, in which case eating little and often should help, I had low blood pressure which made me dizzy but I just sat down and rested till it passed then carried on!
With the pains these are usually normal too, I was convinced my period was about to arrive when I tested when preg with my daughter as I had bad 'period pains' and felt like I was about to come on for a few weeks after finding out and the pains continued intermittently throughout, it is just your utereus etc stretching to accomodate your growing baby. It the pains get worse or you start bleeding then call your docs/midwife to be on the safe side.
I hope that put your mind at rest for now. why don't you join your due date thread on here, all the ladies are lovely and supportive, my dd is nearly 2 and I still chat to people on here.
good luck and enjoy your pregnany.