Need advice from woman with pcos.. Please???

Bear with me this will be long.
​I've had 3 miscarriage in total. My first one I was 11 weeks but never got past the fetal pole. 
​2nd was just an empty sac
​After then I found out I had pcos, they told me I had enlarged ovaries and elevated testosterone
​I took 500mg of metformin daily and very quickly got pregnant with my son.
​I continued to take the metformin through my pregnancy even though I was advised to stop off of my consultant. 
​He's now 20 months old.
​I had a pelvic ultrasound in feb/march due to pain at my c section, I was told there was no obstructions that would cause the pain and my ovaries were now of a NORMAL size ?  bloods came back fine too. Thyroid perfect.  
​I had another miscarriage in April-May, didn't know I was pregnant. I got my "period" when expected, I did ovulate a bit later that cycle. It was only after I had severe cramping and bleeding after my "period" I took a test which all came back positive and A&E done blood tests and dip tests all came back positive. Scan next day revealed a completely empty uterus but had continued to take 500mg per day. 
​Now I'm pregnant again, i found out on the 29th. I stopped taking metformin about 4 days before I ovulated. Had enough of it and decided to his up. I got my peak on the 18th but I had quite bad cramping then too so I'm assuming I did actually ovulate on the 18th too so that would make me 14 dpo today right? Out of a 30 day cycle. I have absolutely no symptoms apart from cramp which can be quite uncomfortable.  And my tests aren't as dark as what they were with my son (I found out with him at 8dpo) glow said I was due af on the 29th but everywhere else said the 30-31st. 
​So I found out at 11dpo, my question is  
​, should I start my metformin again?