Desperately need advice - dev with unrelated degree

Here is my situation: I'm 26, I have a BA in psychology from and for the last 10 months have been working as a dev intern at a random startup. Ive been job searching and looking for entry level SWE jobs for months, hundreds of applications but no callbacks. Im starting to get worried about how stable my future in a dev career is, especially because I dont have a related degree.

I want to end up at a big company as a developer, have a decent salary, good WLB and benefits and just feel secure in my job (startup feels insecure). It doesnt have to be big tech, just a stable and respectable company, a perfect job for this would be something like a developer at RBC. Im really wondering what my next step should be. Should I go back to undergrad and get a CS degree?

I know the market is really bad right now for entry level even for people with cs degree, but I wonder if my lack of education will hurt me not only in entry level but also long term. Im confused about my future, what are some options I could/should do?