Strong startle/Moro reflex freaking me out


My LO is 10 weeks and just today started having a really strong startle reflex when she’s lying on her back... playing on her play mat, on the changing table, at the pediatricians office (luckily we had an appointment so we could ask while we were there), like out of nowhere totally freaks out.

Anyone else? Or advice on how to prevent it from happening when we are changing her or just playing with her? I’ve read it can last til 3-4 months which seems like a longgg way away if this will happen every time she’s on her back!

Ps. We swaddle for naps and at night, so hopefully that’ll help during sleep.