Serious question please help

I'm 16weeks and 1 day... for weeks my body has just been continuously aching everything hurts except my stomach.

My doctors prescribed me tylenol for the headaches that have now stopped but they also prescribed me Baby aspirin/tylenol (Blood thinner) as they told me my blood pressure is borderline...

I'm worried about this and have never taken blood thinners specially while pregnant even the pharmacist looked confused and worrisome as she looked back in my file and still handed me the prescription as prescribed...

Should I actually take them?? And what do I do about my body aching it's really bothering me its all day everyday.

Any advice please.