30 weeks and a little hard to breath?

I’m 30 weeks and today I’m finding it a little hard to breath and this doesn’t really happen it’s kinda rare but it only happens lately when we burn incense in the room and the smoke causes my chest to feel like stuffy I guess is the word,like when u breath in to much smoke and it makes it hard to breath.

But the thing is we haven’t burned incense in our room for a while so i dont understand why it would be a little hard to breath.

I don’t have asthma at all or anything of the sort.

Plz no rude comments I’m just looking for a little help cause if it’s nothing serious I dont want to make an unnecessary trip to the doctor and add anymore stress on my husband than he already has.