Should I get my lvl first?

This is my third year of college, I have all my prereqs for any nursing program except for two I am retaking. I took microbiology and chemistry together last semester and didn't make the grades I should have at all and it has put me in a rut. I am retaking them both but am worried that if I don't make the needed grade again I will just keep wasting semesters on them. I either need a B in both or atlas an A in one and. C in the other to level my GPA. I am 21 years old and just feel like I should be doing something already or about to be done. I feel so discouraged and disappointed in myself and now even questioning my major I've wanted since I was 14. However, I just looked into LVN programs and was wondering if this would be the way to go first to assure nursing is still what I want and I could always bridge over to RN later. I am just thinking ahead if this semester does not go as I am planning. Any advice?