Close to teeth popping???

So my daughter is a little over 5.5 months and at her 4 month check up doc said she was teething but nothing close, no big deal. But for the past week or so, she has been drooling excessively, crabby/fussy, rubbing her cheeks, rubbing/pulling her ear, and chewing on EVERYTHING HARD(she's been chewing on stuff since she was 4 months or before BUT it hasn't been this bad). I swear I can feel little ridges where her bottom teeth are coming in (noticed it about a week ago). So I guess I'm just wondering if we should be expecting teeth anytime soon? Any input will be helpful and appreciated! Thanks In Advance!