Ok everyone here ismy dilemma!!

First of all i am breastfeeding my 8 month old bub atm but have ben getting symptoms of pregnancy, such as more tender nipples, urinating more frequently, bleeding gums ( had this last time round and about a week or two ago it started up again), massive tooth ache ( always happends to me when i pg), TMi warning...... losing way more than normal moucus ( also happened last pg, which they tell me is normal in subsequent pg's), dizzy spells in the last week or so, mainly after i have been bending down, really tired alot more than normal, there are probably more but that will do for starters.

So anyway i decided to get a HPT yesterday and tested as soon as i got home, so about 3:30pm. Now this test came up +++ within 30 sec i could see the test line and never got really dark but its definately there! So DH and i have been mentally preparing ourselves and then i go to docs today to confirm and their test comes up ---, now this has happened before , but then they send me to pathology for a blood test and it comes back saying threshold!!!! Which apparantly is inconclusive!!
So i am supposed to go back in 2 or 3 days and have another BT. I am so frustrated and would love other peoples opinion as to what is going on with my body!!!! It was not aplanned PG but i hate hanging even for a few days, so if you have any theories i would love to hear them.
Thanks everyone in advance