Trying to conceive!

Hello everyone! I am currently trying to conceive my second child with no luck so far. I had trouble getting pregnant with my now 7 year old daughter it took a long time. I went through dr after dr and had quite a few procedures done and nobody could tell me why I wasn't getting pregnant but it finally happened and we were so excited! But we have been trying to have a second child and it just isn't happening. Does anyone know of any supplements or pills that me or my husband can take to maybe boost or chances? Or any tricks that might help? Thank you :-)