I was driving to a friends house and turned around when my van nissan axxess started jerking in a back and forth motion. I got home and checked around for maybe a loose or broken belt checked oil and took off cap to smell a strong gas smell the oil seems thin but was just changed last month. I put about 500/km on it since last change, cant figure out whats wrong. I don't want to go to a mechanic right away because I am a woman and they tend to try to RIP me off, If any one could help I would really appreciate it.

Thank You

Val