Chihuahua, congestion? Snorting?

I know that chihuahuas snort, but mine has been doing it a little more then usual. I rescued him about A week or so ago and he's very happy, and eating, and active but he just sounds a little congested to me. I noticed him getting some water a little bit ago and after he got his water he started a gagging, breathing, congested sort of sound for a minute or so. It's a bit hard to explain ... like congested so working for breath, or coughing up a hairball or something. Is that normal? Or does he need another trip to the vet?
I also forgot to add that when he barks he gets his yip yaps out and then it's like when he breathes back in he's snorted (again like he may be congested)

If you're really worried, there's nothing like a trip to the vet to sort out problems and gain peace of mind.
Occasional bouts of sneezing, snorting, honking and wheezing are not unusual in chihuahuas, and is sometimes called a "reverse sneeze".
Reverse sneezes are loud snorting snounds, but they are nothing to be concerned about. It is a common trait in toy breeds. Pulling hard on a leash, drinking too fast or getting overly excited can lead to an episode of reverse sneezing.
Nasal discharge or a cough are true symptoms of a medical problem.

Have the vet check his heart.
I have a Chihuahua that has a heart condition, and what you're saying fits some of his symptoms.

Is this an older chi? My chi had similar symptoms, kind of a sneezing/snorting routine, no problems eating. When I brought her in they found she had oronasal fistulas that needed repair and was the cause of the problem. She did well, no problems since.

I have a long haired chi that sometimes does that. He has been checked by the vet and gets a clean bill of health. I think that condition is common in toy breeds and since my house has 3 little dogs I hear it every once in a while. It seems to happen alot to when they get excited. I love this chi that we have. We got him last year and he is just so happy. Are chis pretty happy by nature? the only chi i can remember growing up was so onery that i was bound and determined that i would never own that breed, but the comes our baby and well mom and dad couldnt resist that cute face of his.

He's approx. 1 1/2 years old. After researching the reverse sneeze a bit I think that's what he was doing. He hasn't done it since then either so right now I'm not worried about it. He does snort a bit when barking but he has since I got him so I don't think it's should be a big concern.
Thanks so much for the info about the reverse sneeze!

My dogs only seem to reverse sneeze when being walked on a leash in the company of strangers in a public area.
I'm sure they think it's me doing the snorting and honking!

About the reverse sneeze, was anyone ever prescribed medication, specifically Theophyline, for this? I had a corgi mix that had been treated for heartworm and then a few years later developed these symptoms. I brought her in assuming that it might be a result of damage done by heartworms only to have her diagnosed with rs. They put her on Theophyline and she had a nasty reaction to it so she was immediately taken off. I'm just curious as to whether it's common practice for the Vet to try and treat it or if they usually let it be..........