I'm pretty sure that the plant has gone back into vegetative stage (going on what you say about the leaves), the seeds were germinated about 4/5 months ago but growth was really slow due mainly I think to it being in a tiny pot and I repotted it, at that time the smell was noticeably stronger, I reintroduced a bit of discipline into the lighting it got (about 10 hours of sunlight, another 8 under a 120W bulb). The idea that it had gone back into a vegetative phase is new to me so I'm gonna do some reading up on that now

It does have drainage holes in the bottom. But no perlite, originally it was potted in common garden soil but when I transferred it the new soil came from a store bought bag of soil.

I couldn't see the form at the top of plant problems but if you can point me in the right direction I'll fill it in.

I've just checked on it and it looks much better, flushing the soil really seemed to do the trick so the original problem was definately overfeeding, I've tried to attach an updated photo

I really appreciate your help