Twitchy feeling and loss of bladder control

I have OAB and I was wondering if anyone else has experienced something like this? I'm in the middle of 6 weeks bladder retraining at the moment and I feel like I'm getting slightly  better at holding on. But every now and again I get this weird twitchy feeling, like a spasm, and my bladder completely empties itself. I've been told that this isn't unusual, but it really freaks me out!

I've had OAB for years. Tried everything. My gyn suggested I try PTNS, look it up on the internet and it will show you how it's done. It's painless and for me it's been like a miracle. It stimulates your bladder muscles. Does not work for everyone, but for me it's been great.

I've been doing cic for about a year, and I wish my bladder could empty out like yours.

I have urge incontinence and bladder works on its own.I must wear diapers to avoid accidents and is a pain when you go somewhere.