Yes I do separately and together I'm just unsure of how exactly to fix the problem unless I play them really really slowly!!!
the solution to your problem lies in the posts of Bernhard, here are some of them.https://pianoforum.net/smf/index.php/topic,5767.msg56133.html#msg56133(huge collection of links)https://www.pianostreet.com/smf/index.php/topic,9159.msg92755.html#msg92755(m1469s index of the forum)
I would also like to know whether it is normal for your hands, wrists etc to hurt after playing for a while? I tend to play for an hour or two without stopping. Is there a limit when your just starting on how long you can play for like an hour a day?
Yes I have a teacher actually I've just had a change of teacher because my one had left which is good because I wasn't happy with my teacher, now I have a classical pianist for a teacher. He's very good, he told me to play hanon but very quickly because he said the only way you can develop finger independence is if you learn how to control them under speed!