Welcome to the board. I did that to my 150QE also bought new about 15 years ago (also a workhorse and LOVE it). I was lucky enough to do it while it was still under warranty. I definitely through the machine out of timing. But I did not have an issue with the pressure foot not coming all the way down. Bummer but best to be safe and take your baby to the pros and have them fix it. I suspect your timing may be off and you may have even whacked the needle bar out of position. ouch, but not to worry, they will surely fix her right as rain in no time (however will seem like an eternity to you).