Weight Loss, Constipation Followed By Loose Stools, Itchy Lumps On Arms And Legs. Cat Had Been De-wormed Few Days Ago. Possible Causes?

Hi, I was just getting a bit paranoid because I found out my cat had worms a few weeks ago. I got him treated and he is now worm-free. I was just wondering if I could have gotten them? I haven t noticed weight loss , nor have I really been paying attention. I have been constipated, followed by periods of loose excretion . I also have these really itchy lumps on my arms and legs. Now, I understand that they could be fleas, but I have treated my house so many times, and have given the cat baths. There have been no signs of fleas in the house since the worms were exterminated. I have noticed that I m not as hungry as I usually am and actually tend to be nauseous.