No, it is not a good idea to switch back to veg. while already in flowering. That stresses the plant out and there is a high risk for it turning out hermi. Once it turns hermi and the female gets self pollinated, the THC production stops and the seeds start growing.

Even taking clones now will cut down your yeild and slightly stress out the plant. Your plant needs all the foliage it can get right now as it is using the energy from the fan leaves to put inot the buds.

I suggest just letting it flower and not take the risk, and if you do take that risk, take a cutting/clone then swict hback. That way, you don't risk losing the entire plant.

Good luck.