What’s the cause ???

Sh

So about 7 months ago I missed my period each month for three month til my doctor finally thought it was long enough she put me on a medicine to “induce” my period which it did ! Then I had that cycle and my next cycle and now I’ve missed 2 periods almost three and not pregnant , it’s making me so irritable bc my boobs are sore and tender and I’m having cramping crazyyy like I cough it hurts I laugh it hurts , and when I’m not it’s jus a constant cramping , accompanied by occasional morning sickness what’s wrong what do I do ???