Even though she is still popping it is a very LOW amount and the vet should be called out. It's as simple as that... I don't believe it's colic YET but more things than colic can happen, colic is a possibiliy though. Something is up, the vet needs t be out. Deworming is to be done every 6-8 weeks (I do my boy every 6 weeks. The bump could be anything, without seeing it first hand it's hard to say. Honestly, you NEED to get the vet out. Best of luck! Keep us updated!