Hello Danika,
I have several thoughts to share.
The first is a direct suggestion on the pain in meditation. You’ve not mentioned how long you are sitting or in what way(s) so it’s difficult to make fine rather than gross adjustments.
Generally speaking what I would suggest is a gentle practice (asana) beforehand in order to prepare your body for the sitting you are doing AND perhaps shortening your time in meditation until you ferret out the back pain issue.
Continuing to speak generally, the mind erects many obstacles when one attempts meditation. It is its way of resisting the retraining from its perceived position as master to its rightful place as servant. Well rested people become tired and nod off, pains emerge in knees, neck, back or ankles, thoughts crop up ever so frequently, and the flesh starts to crawl or itch. Almost without exception this stuff is all “stuff” to distract from the work.
It has been consistently worthwhile in my own practices and those I’ve taught and witnessed to consider this at every turn and effort to work through it as best one can. However it should not cross into the realm of “toughing it out”.
Work to alleviate the back pain on the physical level, consider this might be an obstacle to the depth you seek and deserve in your practice, and use your meditation skills to remove whatever blockage might be popping up for your attention (in the back or elsewhere).
gordon