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Hey Lacy!
There are many reasons why this could happen. There may be a chance that it's because of you discontinuing your medication, it may be a health problem, it may be because of your weight, maybe it has to do with anxiety you may be feeling, there are so many possibilities. As you well certainly know we really can't diagnose you so the best suggestion we can really give you is to go and talk to a doctor about this. It's important that you do talk to a doctor, because it's your body we are talking about, and you have to take care of yourself no matter what, and this sounds like a serious problem. So go check it out and talk with a doctor.
I hope this helped. Take care of yourself Lacy.