Wa'alaikumassalam! Aih, kesian you... a few of my mum friends kena COVID time pregnant juga, and honestly kesian jugak lah diorang masa tu, badan sakit-sakit. Makan yang simple je, paracetamol okay for preggy (confirm dengan doctor tau), lots of plain rice, soup dengan vegetables, and drink plenty of air biasa or air kelapa muda kalau larat. The good news is most moms recover fine, tapi you really should call your gynae or klinik as soon as possible since you're only 13 weeks, they need to monitor you properly and advise on what's safe to take for the body aches. Rest lots okay, jangan stress, and take care of yourself dulu, the baby will be fine InsyaAllah. Mandi pakai air suam and stay hydrated je for now. Hang in there!