Essential oil question

C

I’m not super into them, but I’ve got a few of the cheap basic ones. I’m 34 weeks and super congested, so i was wondering if i could put a few drops of one/both of these on a washcloth and let the steam do its thing while i take a shower to loosen up my nose and finally BREATHE! Are peppermint or eucalyptus safe in the third trimester?