My partner won't have sex with me

My partner and I have been together for four years and want kids but my partner won't have sex with me. He comes up with excuses all the time like he's too hot, tired and money.

When we do have sex it sends my cycle into crazy mode. To the point where I don't know when to expect my period or ovulation. I've tried ovulation tests, temperature tracking, practically everything.

It's getting me really down. I suffer from depression and anxiety anyway and not conceiving is just adding to the strain.

I work full time and my partner gets benefits so money isn't an issue. I just don't know what to do.

I've been to the doctor. I've had an ultrasound and blood tests. They gave my partner a pot to do a sperm test but he's just put it off over and over.

I really need advice ladies...gents. Please help me.