Hi, I'm going out of my mind at the moment.
I had a bleed 14th- 16th May. I had a positive opk on the 3rd June and I think the last day I had sex was the 5th June. My cycle has always been irregular due to pcos however the month before I was regular with confirmed ovulation, I had a 37 day cycle.
I thought I had a faint positive on the 17th June. I then started bleeding which I was gutted about however happy that my body was doing something and bleeding at 14dpo I was happy and hopeful for the next cycle. The bleeding lasted 2days ish second day heavier but stopped quickly.
On the 19th I had my smear and bled a tiny bit after then nothing else.
On the 22nd June I had an urge to test and to my absolute surprise I tested positive, 1-2 weeks on digital a frer and cheap hpt.
I then had my hcg taken on the following days;
1st July - 535
4th July - 766
8th July - 1555
10th July - 878
On the evening of the 10th July I had lower back ache. On the 11th July I started bleeding slightly, I knew all along my numbers were very slow and low rising so wasn't expecting a viable pregnancy. The dr confirmed this with my levels having dropped.
On Monday 15th July I went to the EPU, I had an internal scan and they couldn't see anything in my uterus or ovaries. She did say that my bladder was still quite full I'm unsure if that can have an affect on visibility at all ?! We came to the conclusion that my bloods would probably drop further and my bleeding would get heavier. However my bloods came back at 1378 so had risen! 
My bleeding has got heavier but still not like a full flow, it's gone from pink watery to red and is now showing on a pad. I've no cramps. I'm tired and my boobs feel so heavy but I'm cautious of imagining symptoms!
I've had my bloods taken today so will get those results tomorrow. The nurses were unsure what was happening too!
I know it won't be a healthy pregnancy due to such low and slow rising hcg and nothing visible on scan plus my bleeding.
In my heart I'm praying that my bloods skyrocket, and it turns out I'm earlier than I thought. I thought I was 7/8 weeks. What's the longest an egg and sperm can survive ?? What would be the absolute latest I could have conceived??
Thank you to anyone who can comment, I just don't know what's happening :( hard enough being so excited over a positive and then realising it won't work out but all this unknown is just horrible xx