Should I be doing more?

Newly TTC and I have irregular periods that I have been to my doctor for. I’ve had bloodwork done and ultimately nothing was found to be the cause. Its been about 5 months since last discussing things with my doctor. Basically I was told to lose weight, and if I wanted to get pregnant they could call in Clomid for me to get it done. Should I just give them a ring or should I really try other things first. I am desperately trying to lose weight and I did lose a little. I want to be healthy as possible of course so it makes me nervous to make myself get pregnant. But I really want another baby as our first is almost 5. We had to stop TTC a few years ago because of life circumstances, so now I’m am ready and don’t want to be delayed more. If I get pregnant in the next few months my first will be 5. The age difference is not the worst thing but I’m getting older too.