Oo normal yan sa 28 weeks kaya ng baby weight at hormones, pero since may previous CS ka at may turok sa spinal, mas better talaga magcheck ka with your OB para sure lang, baka need ka ng proper assessment para malaman if it's just pregnancy-related o may connection sa spinal tap mo noon. A few of us preggy moms nag-complain din ng back pain around that time, kaya alam ko realistic siya, pero sa case mo better safe than sorry talaga!