my nearly 4 month old gsd pup has had loose stools today. in the afternoon he gave a little cry while peeing. i thought it was just an ant bite or so. but at night again he cried while peeing. and he pissed in more than three places.. he's got a habit recently of squirting pee{ in sitting pose only}
he broke one of his teeth yesterday also.. whats wrong with him??
i should take him to the vet, i suppose???
why is it paining him to pee??? he's having loose stools too..

Seems like a UTI , get a urine sample to your vet asap.

whats UTI??????

urinary tract infection

I'll link you , http://www.healthypet.com/library_view.aspx?ID=46&sid=2

and what exactly is it ???
will it become alright??

No , bring a urine sample to your vet ASAP , he will tell you what is wrong and how to treat it.

Read more here:
http://www.healthypet.com/library_view.aspx?ID=46&sid=2

About the broken teeth , his adult teeth are coming in so don't worry this is normal. 4-6 months are when they really start coming in fast and baby teeth will fall out.

i've just been there..
it says in the end that if the bacteria spreads then it'll cuase problewms... i suppose it hasnt spread too much if it is UTI. because it strated today and tommorow he's on his way to the vet.

i've never expierienced UTI's in any of my dogs , but my cats are another story. Expensive bladder stone removing surgery is all i have to say.

it wasnt uti after all. it was just a little swelling. we cleansed it with antibiotics{uh }it became alright.
he's okay today. it isnt uti because it says everywhere that the dog will rush to urine very frequently. but this wasnt frequent at all. he stuffed it all and was all drowzy and heavy. and after he's done it.... he's so releived that he jumps around the place till the next trip of urine devolops in his body. we used to say that" look !.. rambo left the tap open!!!! "

Take a urine sample with you and get the correct antibiotics. They'll sort it out and he'll be much more comfortable.