Another Language Mistake

the words are just so similar...

Ndikudwala mmimba = I am sick (stomach)

Ndikudwala mimba = I am sick (pregnant)

and its not even the difference of a good letter like "s" or "t" so that it
is well differentiated... nope instead there is another "m" ....???!!!! and
when arthur was telling me the difference he said one sounds like m and the
other like m.... and im telling you... there wasn't any difference that i
could tell! so im just going to stay well clear of that one!! especially
considering my first big language... if i accidently combine the two I'll be
a marijuana smoking pregnant girl versus a girl whose eaten fish and now
feels a bit sick in the stomach.... heheehehehe.... that could give people a really wrong impression!!! eeek!