Did weaning make you sick??

So Ive finally weaned my almost 19 month old. She’s not nursed in a week, since then I’ve just felt “off”. As in I get dizzy, nauseous almost anytime I eat, sensitive nipples, and running to the bathroom constantly (to #2). I read that some people experience sickness while weaning but I wanted to hear it from actual moms and not google. Is this a thing? Did it happen to you? Please fill me in. I’m miserable. I haven’t felt engorged or anything so I don’t think anything is going on there.