Want to concieve/get pregnant... planning to rid my body of parasites before pregnancy

Do you think it would be beneficial to do a parasite cleanse before getting pregnant? I have NEVER done a parasite cleanse before so I am sure it will do quite a bit for my body. I am vegetarian, but still not the healthiest eater. I plan to change all that and sort of go on a 60 day "getting my body ready" spree in order to create the best environment to grow a baby. I have 3 kids already so this will be number 4 for me. I always suffered from HORRIBLE morning (all day actually) sickness for the first 14-16 weeks of my pregnancies and am curious if I can prepare my body in such a way that it wont have to suffer through that again. I figured the best step would be to go with a parasite cleanse first and get all those nasty things out. I bought enough herbs to do it for a full 60 days. What other things besides the parasite cleanse would you suggest to also do to prepare?