Had a tooth pulled

Monday morning had a tooth pulled. They pulled and packed it with Gelfoam think it was called. To control the bleeding because I was going to college. And I bite done on gooze for 30 min like she said because of the stuff they put in. No stitches it will desolve on it’s own. Today still sore not bad more just gums are irritated and have three sores. What would a dry socket be. I called and explained all this and they said it sounds like it healing good. Those bubbles are my spit . The white is skin healing and possibly the sponge foam they put in