Swollen tongue/scallop tongue

Tonight I noticed that my tongue looked "wavy" around the edges.  I found some pictures online that looked exactly like it and it's apparently caused by teeth pressing into a swollen tongue.  I did just eat, but it was nothing spicy and the same foods I eat all the time.  I do have allergies but they've never been serious.  What could be causing this?  If it's not gone by Monday I'll call my doctor or dentist, but seeing as it's the weekend, I'd rather not go to the ER unless this is likely to be a very serious condition

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A swollen scalloped tongue can be due to food allergies, hypothyroidism (most common cause Hashimoto's Thyroiditis), or vitamin B12 deficiency. TMJ dysfunction can also cause a scalloped tongue.