Parasites after Haiti trip?

I am trying to decide on a parasite cleanse. Since returning from Haiti in mid-march, I have had slight stomachaches, felt fatigued, and even thought I saw some in my poop. I had a little blood in my stool last night. Does that kind of bowel irritaion indicate that I should not cleanse, as it may be too harsh a treatment for my body right now? I was interested in this product "Fresh Green Black-Walnut Wormwood Complex" by NOW Foods, as I read some good reviews, and its cheaper than some capsule cleanses. How do I use this for ridding parasites? Also, I thought of the possibility of malaria, and have heard of Wormwood being used as treatment.
Any advice or experiences with the Black-Walnut Wormwood complex would be appreciated.
Thanks in advance!