I know I've seen other posts, at least archived ones, about women who have experienced strong impulses to smell certain scents, like cravings but for smells rather than foods and literally every response comment was about anemia or pica.
I just thought that I would share my experience in case anyone else was having similar concerns. Since about week 20, I have had very strong impulses to smell nail polish remover, cleaning solvents, bleach, chlorine etc. I never wanted to eat the chemicals but I definitely wanted to breathe them even though I knew it wasn't healthy. After finding myself cleaning more often and spending pool time with my nose close to the water, I realized I wasn't doing a good job of resisting the urges so I spoke with my doctor. I had full blood work done and I don't have any anemia or any other deficiencies. My doctor does not feel there is anything suggesting pica because I don't want to eat the chemicals and pica cannot be controlled by knowing its not healthy. True pica causes uncontrollable impulses. My doctor isn't really worried and I have found a pregnancy friendly menthol stick I can smell when the impulses get very strong but, I just wanted to relate my story for anyone who may be googling to see if they are alone/going bonkers. I have had no food cravings but god, that nail polish remover bottle screams my name a few times a day. Apparently, it's just another weird quirk of pregnancy. So, fear not, we are normal fellow sniff cravers!