What would you describe SPD to feel like?

Alex

If you have it now or in previous pregnancies, how would you describe it? I get that cramps are normal and i try not to worry, this is baby 3 so i know what contractions feel like. But jesus am i cranping in the lower lower belly, and it feels like ive had a field of horses kick and trample my pubic bone/pelvis. I dont want to go to the early pregnancy assesment unit here in the uk because im sure baby is fine, hes kicking away, and im pretty sure this isnt early labour, so i dont see how they could help me. Any advice would be greatttt