1) do you see any "witch" in the bible described as a healer or herbalist?
Search if you wish, but you won't. Anyone telling you different is misleading you.
2) Do you see descriptions of what are considered witches in the bible?
Search if you wish, you can find it.
hint; look for these passages.
anyone who practices divination or tells fortunes or interprets omens, or a sorcerer or a charmer or a medium or a necromancer or one who inquires of the dead, for whoever does these things is an abomination to the Lord.
A man or a woman who is a medium or a necromancer shall surely be put to death.
Do not turn to mediums or necromancers; do not seek them out, and so make yourselves unclean by them:
Then Saul said to his servants, "Seek out for me a woman who is a medium, that I may go to her and inquire of her." And his servants said to him, "Behold, there is a medium at En-dor."
Evil spirit indwelling;
we were met by a slave girl who had a spirit of divination and brought her owners much gain by fortune-telling. She followed Paul and us, crying out, "These men are servants of the Most High God, who proclaim to you the way of salvation." And this she kept doing for many days. Paul, having become greatly annoyed, turned and said to the spirit, "I command you in the name of Jesus Christ to come out of her." And it came out that very hour.
And he burned his son as an offering and used fortune-telling and omens and dealt with mediums and with necromancers.
Or a charmer or a medium or a necromancer or one who inquires of the dead,
Moreover, Josiah put away the mediums and the necromancers and the household gods and the idols and all the abominations that were seen in the land of Judah and in Jerusalem, that he might establish the words of the law that were written in the book that Hilkiah the priest found in the house of the Lord.
Nope, not seeing anything about midwives and herbalist. I suggest whoever told you that was in the bible is insufficiently knowledgeable to teach you about the bible and you should abandon them as a teacher and look for someone who actually does teach "bible things in bible ways" and avoid those who "do not cease to pervert the word of God". If you wish to please God and Christ, you would not stay with those who continue in teaching such obvious error.
Oh, look, it's just a google away!
http://www.openbible.info/topics/witches