The best person to answer this would be an Orthodontist.
Next Steps
I would suggest you to search for an orthodontist and take an online appointment followed by physical check up. Being an adult your compliance to treatment would be very good, which means you must take a lot of initiative to stick to the treatment advised so that desired results are achieved.
Health Tips
Orthodontic treatment is very comprehensive and there is no short cut, if you want long term positive result. The best treatment plan can be advised only after checking your teeth physically. However, 8 months seems to be too short.