Im presuming you mean white spirit, as this is what i would normally use to strip paint. If so, if it is still about, then get rid! Apparently prolonged exposure is not good, although im sure 1 day wont hurt.
https://www.nhs.uk/chq/pages/2531.aspx?categoryid=54&subcategoryid=131
Solvent-based paints
Solvent-based paints can contain varying levels of substances that can be harmful, such as white spirit, xylene, toluene and alkanes. Long-term exposure to solvents can seriously affect a developing baby. Solvents can irritate the thin lining of cells (mucous membranes) of many parts of your body, such as your nose, mouth and eyes. They can also cause headaches and nausea.
'Quick drying paints' often have a high solvent content, and will usually smell unpleasant.
If possible, you should avoid using solvent-based paints whilst pregnant, to help minimise any risk of the fumes or substances affecting your baby.
For example, if you frequently use solvents, or materials containing high levels of solvent substances, (perhaps as part of your job) then your baby may be at risk. Talk to your employer if your job requires you to frequently use solvent-based products.
I know this doesnt discuss white spirit alone, but as part of a paints ingredients so to speak, but obviously if not advised as a part of something you are smelling, then i wouldnt suggest having it around in pure form.
Really hope i havent worried you. I googled it as its something that i probably would have used next week, and hadnt thought about it myself.