I took organic throughout my entire pregnancy (spring…found out I was pregnant a couple of weeks into the semester…and summer semesters). The first semester the professor just had me not touch any of the chemicals (he gave me a lab partner who did all of that) and was more strict about everyone using the hoods. The second semester we used tiny amounts of the chemicals (seriously, we had tinsy, tiny beakers, etc) and that professor didn’t have any restrictions on what I could do in there. I had absolutely no problems at all.
I wouldn’t be worried about physics or gen’l biology.