If you just had tomatoes I would more likely assume that's what it is.But, if you think you might have parasites you can try a 30 cleanse and see how you feel.
I started with a 30 day herbal cleanse which was brutal. Then I did meds for them, then went back on the herbs, and a couple weeks later did another round of meds.
It wasn't until finishing the second round of meds that I really saw the difference in my energy. I can now handle both meds and herbs (taken separately) with very little die off.
Onwards has posted her herbal concoction here for deworming. If you want to start with the basics it's usually cloves, Black-Walnut and Wormwood .