Feeling feverish

Oh backache spreading to pelvic area at week 13 can be normal because your body is starting to stretch and your ligaments are loosening up to accommodate your growing baby lah! Round ligament pain is very common in first and second trimester and can sometimes feel quite sharp or achy around the pelvic area, so that could be what you are experiencing. But since you mentioned it sometimes gets bad, please do mention this to your gynae at your next appointment just to be safe, and in the meantime try to rest more, use a pregnancy pillow for support, and avoid standing or walking too long, but if the pain becomes very severe or you get fever, bleeding or unusual discharge then please go to the hospital immediately and don't wait

hi dear it could be round ligament pain due to stretching of the uterus to accommodate your growing baby, or pain due to relaxin loosening muscles joints and ligaments to prepare for childbirth, or just pressure on certain nerves from the spine. if there is no bleeding there should be no immediate concern, but you can bring it up when you see your gynae just to be sure