Ttc and Very confused

Heather
So me and my husband have been ttc fr about 1.5 years with no luck. We have been seeing a fertility doctor for about 6 months now. I was diagnosed with pcos and I only have about one period a year with out meds, and I don't ovulate when I do have a period. So my doctor put me on clomid and something else that I can't remember the name of and told me to test for ovulation in a week until I get a positive. I got a positive three days in a row on an ovulation test and was super excited. The doctor asked me to come in in a week to do a blood test just to make sure that I actually did ovulate...it came back negative, she had me do another blood test yesterday for the same thing (one week after the last one) and it is still negative. I have another blood test on Monday but has anyone else gone through this or know what's happening. I'm very confused and frustrated with everything that is going on right now and any advice would be great.