Advise would be nice...

I have been trying to convince naturally for 2-3+ years with PCOS and irregular cycles. My last period was March 18th and I'm at cycle day 96 without a period. Going on the results of Clearblue Digital ovulation tests, I had my first peak result May 23rd. Ever since then my nipples are sensitive, CM has been creamy and my cervix is high. I took a Tesco brand pregnancy test yesterday evening with a negative result. 
Should I ask for a blood test? If I'm not pregnant what are my options TTC? Is <a href="">IVF</a> my next option?I don't know what to do next, I feel my doctor isn't much help. I just want to start my family but it's so hard without regular cycles.