Should I be worried (thanks for answering)?

I am 18 dpo or 4 weeks, 4 days pregnant. I got a positive pregnancy test about 5 days ago and keep getting positives ever since. For 3 days after first positive, I was feeling lots of twinging in my uterus throughout the day and at night. For the last two days, I have not really been feeling any. I am a little worried, but it makes me feel better to know I am still getting positives on tests and I started feeling a new symptom this morning (sharp ache on side of ). Does that mean I shouldn't be worried? Experienced pregnant people, I would appreciate your answers very much. Thank you.