Is It Anxiety ?

I suffer from panic attacks but don't get them often. I am not sure if this is a panic attack because it seemed scarier than ever. I woke up about midnight because it was a bit stuffy and my allergies were bothering me causing my breathing to be uncomfortable. I got up to use the bathroom and got really shaky and my heart was beating fast. I felt a bit of indigestion also. I went and grabbed a mint, and a sip of orange juice because some times I get hypoglycemic. I just started feeling worse and worse. Heart pounding. Couldn't get a deep breath, really shaky. I had to go outside and get some air and just walked around trying to calm down and almost started dialing my cell to 911....about 5 minutes I started to feel myself calming down....my heart getting back to normal, got a deep breath in....now I feel relaxed. Was that a major anxiety attack? Another thing I noticed is my mouth went completely dry. When I started calming down, it went back to normal.