Sounds like you have just a burst ovarian cyst there.
Not many things hits the paralytic pain scale in a split second - but bursting a cyst will do exactly as you described.
You are lucky if it died away after 30 mins - sometimes the pain can take hours to dissipate.
Next step is to visit your GP and explain what happened and ask if you could be referred to hosp for a scan to confirm if that was a cyst - even when burst - the debris will still show up for a week or two. You may need a follow up scan again in a few weeks time to check and make sure the beast has not filled up again. They can do that sometimes.
Most of the time the burst is all that happens (painful as it is) and the body reabsorbes the contents of the cyst in the comming weeks - while the surrounding organs that got hit buy the explosion recover eventually from their bashing and irritation.
Occasionally the bursting can cause other damage or infections etc - so it should be monitored, even though GPs are reluctant to do so sometimes.
As it was your 1st, it may be the only one you ever experience bursting - but it could just be the start and you may have others in the future too.
If it does happen again - straight to A&E and get it scanned and more importantly get the super strong pain relief you will need.
There can be serious complications from a burst cyst occasionally so it shouldn't be ignored. Please see your GP even though the event is now passed, it can be noted on your medical records.
Cybers Hugs to you - had that twice and you have my every sympathy.
Please reassure your BF that is was not his fault - just one of those things could have happened at any time at all.
Better that it happened when it did than when you were driving the car or out shopping etc.