My daughter is 9 months old we have been ttc for about 5 months..

I fell pregnant in March but at 5w 3d (april14) I lost it... was due dec 9th hcg dropped from 144 to 10 never any lower then 10 never had a scan I feel movements and stuff but all my tests are negative they won't let me go for a ultrasound because there no proof I could still be pregnant I have had periods barely there but still periods I'm due in 2 days and every brand is giving me weird results it'll come up positive for a min or 2 then completely disappear my Dr won't do bloods unless I get a positive test. I'm not seeing things as my partner has seen it too.... pink line and all then bam gone digital says negative but all line tests show then disappear

How the hell can I call pregnant!?

I need this to happen before I give up completely April 2017 I miscarried at 11w2d then after heaps of testing they told me I had under 20% chance of conceiving and carrying to term I had my little girl in October but since then I've had issues conceiving I've had 7 pregnancies but only one to pull thru I don't know what to do anymore I track ovulation by using opks but without fail I bleed every month my girl puts her head on my belly saying bub bub or bubba I feel like she's trying to tell me something or that she wants a sibling 😭😫 I'm so lost I don't know what I'm asking for but any help is appreciated

Picture of my girl