I just recently gave up nutrasweet and aspartame because I felt like it was giving me a "funny" feeling and I didn't like the fact that it was just chemicals. However, I kept splenda around because I thought it was more natural and not as bad for you. I've noticed, though, that after I eat it, I get this tingly feeling in my lips and they seema little more swollen. I also sometiems will get a headache or a stomach ache. Am I allergic or going crazy? Or something else??