Bad Cramping in TWW

I am TTC my 3rd baby and had no issues with dd1 and dd2. My cycles have recently gone from 28 days to 25/26 days, still regular, just shorter for some reason 🤷🏼‍♀️

Anyway I am in the tww of month 4 TTC and I am having bad af type cramps and feeling really down. The cramps have been going on since yesterday along with lower back pain. It seems worse than normal af cramps though - like it’s the first thing I notice when I wake up. Anyone had this and still got BFP? I feel like I’m out but just worried as to why the cramping is so bad.