Any lefty turned righty bassists here? If so, please help.

Just play... MUSIC....in the most natural and comfortable way for you.

 

No tips, but it does sound like you might be lefty unfortunately.
However I would try asking in the DB (Talk Bass Double Bass) forums.

 

It seems like the best time to have started playing right handed would have been at the very beginning of your playing. Switching now would be taking on reversing all the brain, hand coordination that you spent 6 months ingraining. Is there a reason you want to do it other than better availability of basses?

 

Sell your left-handed bass, get a right-handed bass, play it and Bob's your uncle.

 

This. If you keep a lefty bass around it will always be easier to play it.

Do you remember how awkward you felt the first time you played bass ever? Welp, the first time you play right handed it's going to feel the same way.

 

The only thing that I can think of is to play right handed and don't look back, but then you already have invested in a left handed bass.

I had a leg up a family friend who was my kindergarten teacher forced me to write right handed, when I played basketball I spent many hours working my right hand. The woodwinds, and piano I played while growing up did not make allowances for me being left handed however I never could get the knack of playing a drum set. And the tools of both my Army career and my latest, 25 year, job has required me to use my right. So when I was picking up a guitar for the first time I had the mindset that like with my sax and clarinet I would have to adjust to the tool.

 

Bah! I play lefty and have for 20 yrs. If it feels right do it and forget what the rightys say. First off, a ton of basses available at all levels, second, NO ONE asks you to play their bass! Further, if there is something you want and cant find, ya figure out how to do it yourself. Your lefty so theres a good chance you have a potential for more than most as science has proven. Left is right, right is wrong.