[Closed] Lower back pain getting really bad. Options?

I started suffering with lower back pain about a year ago. I did a bit of research and decided that I need to do more core work. But it has now got to the point that when I get off my bike I struggle to stand up straight because I feel so stiff.

I changed my bike frame to a bigger one a few months back as a result of my old one being too small, but this has not helped the situation.

The lower back always play me up as well if I have to stand up for a period of time. For example in a queue.

Now I feel that I should go and see someone as it really starting to nag now.

There are so many options.

Physio
Osteo
Chiro
Massage Therapist
Bike fit

Just wondered whether anyone has had the same and been to see someone and seen any improvements

Thanks