Helicopters going back and forth like crazy over area in south tulsa area. its very strange and annoying. anyone else???

Ok, seriously. For the past 3 nights now... I keep hearing helicopters go over our area.... over.. and over and over from like 6:30pm/7pm to about 9:30pm. and off into the distance and be REALLY FREEKIN LOUD! Lastnight was annoyingly so. LOL i kept trying to listen to music and it kept going on, and shaking the apartment really bad. Sounded like each of them were wanting to crash. LOL now, tonight.... since got home... there's been at least one going overhead every 5-10 mins. not as loud, though. WTF is up with that???
We live in South Tulsa.. about 10 mins outside Bixby. Nothing in the news. No sirens, nothing else. Just loud ass fucking helicopters. And a "boom" sounding thing that goes on in the distance that sounds like a sub-woofer, but I dont think it is. So, with all of this combined, I keep thinking we are having an earthquake.... though we aren't. but each time, im like woah wtf? and then its a loud ASS helicopter in the background coming forth. so....... anyone else in the area hearing this crap?