Hi Kel78, sounds like my 5 yr old too.
My son is adopted and I have had him since he was four weeks old, he was prem. he has had a paediatrician since birth and they have never diagnosed anything even when I went with long list of things about him. They said he was a typical boy just a little hyper. Keep plodding on. The school he is in got OT involved and they dx SPD. It's difficult but with a dx you can find out how to help him best. Also to come here with these friendly helpful people who have SPD or have dealt with it is a godsend. Living with it and finding out why these kids do what they do without them knowing why is like running through mud in large wellies.
Finding someone to talk to who knows what they are going through and maybe how to deal with it is information even dr can't tell you.
I am so glad I found this site as I am in UK and not many people here know about it. There is not much help here or information on it except the OT.
SPD is life long as I have been told but as these good people on here will tell you there are ways of dealing with the problems and as they get older and can explain what is going on they learn themselves what they need to cope.
Think that's right and if I am wrong there will be someone on here who will explain if I got it wrong.

Keep posting it does help.