Sore lower back

Hi guys. So I came on here a few weeks ago excited to get back to working out! I decided after lots of advice to do jumpstart, which I was loving, then halfway through disaster struck! I work at a school and the kids are always cuddling me and sometimes swing from me, I have an extra vertebrae in my back making it weaker so basically it was one swing too many and my lower back was in agony! Could hardly get out of bed or walk to the shop! Needless to say I haven’t got jumpstart finished and I go on holiday next Thursday to Greece! I have been lying on my yoga mat (even getting myself to lie flat on the floor was painful but slightly better now) doing some stretches to try ease it, and also short walks! Wondering if anyone knows some gentle workouts that will help my back? I was aiming on getting back in shape for next Thursday now I just want pain and stiffness free! The chiropractor has a 3 week waiting list 🙈 Any advice would be so appreciated

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