teething troubles 😩

My little boy is 8m old and has no teeth yet but is teething like crazy. I've bought him some Nelson's Teetha sachets (I used the same brand colic sachets and they were amazing) so hopefully they'll start to work. He has Calpol every 4 hours too. He's just crying non stop, even in his sleep whilst still being asleep?!?! And he's not the same baby as he usually is! I just can't seem to make him happy or comfortable. Ladies have you any tips for me? I'm in the UK so a lot of the medication you may use, depending on where you're from, I may not be able to get hold of! X