In fact, a couple isn't considered "infertile" until they've been unable to conceive for at least 12 months despite having frequent unprotected intercourse. So most physicians won't begin an infertility
workup until you've tried for a minimum of one year.
You mentioned you were trying to have "another baby." i presume your current boyfriend was the father of your previous baby, which indicates you're probably still fertile as a couple and it will just take time for you to conceive. Whether your current boyfriend was your first baby's father or not, you can increase your chances for conception by having more sex
around the time you ovulate, which occurs in the middle of your cycle (typically about two weeks prior to your next period). Some women check their temperature every day upon awakening to determine when they ovulate. A drop in your temperature usually indicates that ovulation
is about to occur, so this is when you should increase your sexual activity. A rise in your temperature of 0.5 degrees or more signals that ovulation has occurred, so sexual activity should continue through the next day or so (your egg only survives for about 24 hours following ovulation).
You can also use a home testing kit to determine when you ovulate. These tests are similar to home pregnancy
tests, and they can be found at your local pharmacy. First response and clearblue are two popular brands.
If you have real concerns about your fertility or if you have further questions about how to improve your chances of conception, talk to your doctor.