ETA: I know there is another gal on here who has dealt with a lot of spinal pain and problems in her fitness journey. It's driving me crazy that I can't think if who it is, but I think she's a semi-regular around here. Maybe she will chime in. Awesome job to you on your comeback from all that !
Hi and welcome! Good luck with your first half- it sounds like you're well on your way. I love dairy, but it does not like me prior to long runs either.