Hey guys i have a problem, brewed for the 1st time in 12 years this past sunday.I did a stout with english ale yeast, it started bubbling great with plasti bucket, with airlock. I woke up monday morning and it had popped one side of lid up. I put it back on tight and it started to bubble slowly a half hour later. Got home last night and ithas stopped!!! Theres no way its done fermenting so do I shake it up? add more yeast or just leave it til i transfer to secondary?