I’m worried and need some advice

So I’m pretty sure I’m pregnant. I’ve got the constipation, weird tummy feelings, lower back pain, headaches, and a faint positive pregnancy test. (I’m waiting about a week to test again🤞🏻Anyway, this morning I woke up feeling like death, stuffy nose, headache, achy body, and a low grade fever of 100.8. I know, it’s low, but I never EVER get sick, especially something that causes a fever. I read online that a high fever could damage some tubes or something with the baby, so of course I’m getting a little worried. I plan to try to break my fever, and drink LOTS of water, but if anyone has advice or has been through the same thing, I’d really appreciate some good news.