Teething?

Inese
Hello. Are any of April babies teething yet? I would like to have advise , I can't tell if my daughter is teething or not . She will be 4mnts on 30th and last week she's so fussy , but last 3 days she's just not happy at all. She started to put her hands in mouth around 3months so I can't tell if she does that now because of teething or not. She is drooling but not too much. I got her teething toys, she does put them in mouth but don't chew for long , looks like she put them in mouth just out of interest . I tried to feel her gums and look at them but nothing unusual . The only thing makes me think she is teething ,she goes crazy for my chin . Yes chin. While I was carrying her she tried to bite me and she got my chin , first I didn't let her bite it but then I thought I see what happens . She went crazy she was sucking rubbing her gums and bite so hard on it I was surprised ,she had lots of drool and she was shouting and kept rubbing her gums . Strange.