He has developed problems with his speech in the last 4-5 weeks. I'm not sure if it is a 'true' stammer iykwim as he is generally getting stuck on a whole word at the start of a sentence, like 'I ..I..I..I..I..I want to tell you something mummy', rather than getting stuck on a sound or bring unable to get any words at all out. It seems to me that it's worse if he's trying to make 'an announcement' about something! He voice gets louder and louder when he's trying to talk and he takes huge gulping breaths as he tries to force the word out- it sounds painful! He's 3.7. I am just trying to ignore it at the moment. Funnily enough his sister had a similar thing at the same sort of age which she outgrew but his seems quite a bit worse. Any advice?! Thanks!