the last time I had a flare up I had a couple of Tablets in the cupboard from 3 years ago, I told the doc this and said I need some more and they prescribed (UK), but as you say they are very reluctant to prescribe these things. Truth is I usually only need to take 5mg a couple of times a day for a couple of days and it lets things calm down and I can get moving again.
What I do religiously, every night before bed is:
Do at least 3 slow breaths in each position apart from the Windscreen wiper.
Lay flat on back on floor, bring knees to chest and allow the back to relax, maybe rock side to side to massage out the lower back.
From this tucked position extend one leg out straight and keep the other leg held tucked, swap to other leg.
Bring knees together so your heels are by your butt cheeks, windscreen-wiper the legs to the left then to the right with a held breath at each side, releasing the breath when the knees are vertical before going the other way.
Reclined Pigeon, bring your knees together and cross 1 foot over 1 knee, grasp around the back of the upright leg and gently stretch keeping your shoulders relaxed and as flat to the floor as possible, swap and do other leg.
Mini Cobra pose / Sphinx Pose, laying flat on stomach, elbows kinda under shoulders and push up so you look like the Sphinx, go easy on this one as it could be easy to nip something so trust your body and only go to what feels comfortable for you.
Wide legged child’s pose, think of looking like a frog, harder to describe this one I might have to look for a picture. Keep neck and spine inline, wiggle side to side gently to ease into it.
Cat-Cow, on all fours, hands under shoulders and knees under hips, drop the belly and look up, switch round and pull the belly in and arch the back upwards and gaze between your knees.
Always listen to your body, if anything nips or hurts ease back, and remember these things aren’t instant fixes they are things to add into your daily routine.
I’ll happily admit that if I wasn’t doing these things every day I think I would be in a pretty bad situation.