I had an early miscarriage 4 weeks ago & started ttc straight after bleeding finished. I have been feeling very pmt ish the last week & am a bit back achey & have a bit of pelvic pain too. As after a week af hadn't arrived I did a preg test this morning and got a bfp. Am pleased but also worried it might not be true - it's a cheap early detecting one off ebay. Plus my acheyness is more like period pain, is this a common symptom? Have got a metallic taste in my mouth though & feeling generally yucky. Am tempted to go & buy another preg test but don't want the disappointment of a negative ifkwim.
It's hard to say if you are pregnant again or not. I had a bfp for about three months after a miscarriage. It is entirely possible that you are though but it might be best to go to the midwife in a week or so and as them to do an early scan.
Someone else might be able to advise better re monitoring of hormone levels that can be done too.