Look if you are saying that you feel suicidal or anxiety attacks from taking anything- stop taking it.
Be it weed, alcohol, carrots, coca-cola- if it makes bad things happen, taking it is a bad thing. Everyone is different. There are literally some people that can't drink water or have a shower... ok it's not the h20 that is hurting them but extreme chemical sensitivity to other things found in tap water- but do you get what I mean?
I've never EVER felt really paranoid, depressed, suicidal or any of those other symptoms of mental illness while smoking weed- and that's why I think it's personally ok for me but not necessarily everyone else to smoke (also as a side note i've also done IQ tests and have other reasons to suggest it's not hurting my cognitive ability, hand eye co-ordination or any other factor of my life- but again I can only speak for myself and not anyone else).
Seriously it is not normal or ok ever in your life to feel suicidal. If that ever happens, seek professional help and try to avoid any factors in your life inducing the feelings (including drug use).