Teething?

I do believe we may be experiencing teething. Killian has an uber-runny nose, drools like the dickens and then coughs because there's so much spit, has been clingy and whiny, has a Tony rash on his face, and sleeps a lot (opposite of what I thought would happen). Plus, he chews on everything. I haven't seen or felt any bumps on his gums, but I do believe this is teething. Here's hoping for a happy baby soon!