Braxton hicks??

This weekend I went on a trip and we did a lot of walking . I’m 27 weeks ( due April 20th) with my 3rd I know It sounds crazy to asking if what I felt was Braxton hicks or not but my last baby was 5 years ago and I have a lot of complications with her so It kinda becomes a blur .. but we had done a lot of walking and out of not where my lower lower back and lower part of my stomach started having sharp pain in them . I tried to walk slower and be more careful but I was very painful and It lasted probably 5mims and It stopped. And my back has been hurting me ever since but nothing I can’t handle I said It feels like I’m having a period . BUT I’m not doing anything else when I go to the bathroom I wipe there’s nothing . And baby is very active and I feel fine other than my back is hurting. Any advice is appreciated I do have a dr appointment for next week anyways . So I figured I could go more into detail with them then but I didn’t want to mention It if it’s nothing ya know