12 hours after taking a tea based stimulate laxative, im still constipated due to the stool being too hard causing butt pain. would it be safe to miralax as a tool soften to try to get relief?

Anything "tea-based" is such a weak brew (something that does not seem to occur to people who prefer "natural" remedies) that you'd probably have to drink many gallons of it to achieve an effective dose - assuming it works at all. So yes, you can go to MiraLax if you want to.

Miralax is relatively safe compared with most other laxatives. However, diet and exercise are the most important measures to combat chronic constipation. Besides diet modification & exercise, you should try stool softener first, before frequently using laxative, even Miralax.