Should I be worried??

According to the app, I’m 8 weeks today. Due to covid, my OB has no openings until early Feb., so I haven’t gotten a confirmation from my official OB. However, there is a free clinic by my house and they were able to confirm a uterine pregnancy (this was a few weeks ago, so super early). My symptoms have been generally mild, some nausea, but I take unison to help that - had to take it my entire first pregnancy. Today though, I woke up with horrible nausea, bloating, and stomach pain. There was also just a tad bit of spotting, but not enough to cause alarm. I had a really bad back ache two days ago that lasted two days and all the sudden that’s better too.

Later on in the day today, I had body aches, accompanied by chills that lasted hours. No fever luckily.

I’m overly worried, and I know I shouldn’t be. Has this happened to anyone else? Or should I contact my doctor?

*update* I woke up to bleeding with many clots. Went to ER and it’s a threatened miscarriage. Plus HCG and US are only measuring 5 weeks :(