The science portion is hard in any program you go to especially w/lab. Most schools do require lab and as a safety I would take the classes w/lab so just in case you decide later on to go to another school, you would not have to go through the process of repeating these science courses. If you want your BSN go for it, don't let the science portion be your fear because I've learned as going through this process that every step I/we take to becoming a nurse we're always encountering new fears (new situations) and have learned to just do my best, take advantage of school and fellow classmates resources and just keep going.
It's hard going back to school with a family already intact, but I'm doing and you can too. GOOD LUCK.