I know it's hard, but you're right at the beginning of the journey and you might be about to find out why TTC is such a journey, and why people get so excited about finding out they're pregnant.
Starting TTC is so exciting, but the excitement can soon wear off. Keep in mind, this is a forum for people trying to conceive and the 'norm' is 1-2 years for the average, healthy couple. Those who have trouble or are worried are more likely to seek out guidance from a forum like this, therefore there will be far more threads (and people) talking about waiting years to see a positive pregnancy test. It is a very emotive thing for people, and not everyone can give reassurance when it's taken them 3-6 years to conceive. Some people never see a positive test, or discover 2 years in that they need IVF or alternative methods, so when someone comes in saying it's been three months, it can sometimes be difficult for people to be understanding.
Having said that, and it's not a fun point, but no one can really say why anyone else hasn't conceived, or what's going on in someone else's body. Sometimes there are no issues at all and it takes years. Sometimes there are underlying issues that take time to unearth, but it all takes time finding out. It's a difficult one when you feel time isn't on your side or when you're struggling with anticipation, but be prepared to be on this journey for quite a while just in case. Ignore how fast all your friends seemed to conceive. Ignore what your mum says. None of them are you and you don't need the pressure of thinking you're not going fast enough.
To provide the opposite POV, I've fallen pregnant first time we've tried every time we've tried. I've yet to have any children. Even those who don't struggle to conceive may end up struggling to keep a pregnancy, or with issues further down the line. I'm 18 weeks with pregnancy number 3 now, and hoping beyond all hope that we actually get to meet this one.
I'd say keep doing what you're doing. GPs sometimes recommend having sex every other or every two days from your period to the next one (if it arrives). You can also look for some vitamins that are particularly targeted at cycle health and egg quality too. Buckle up and have a look around the TTC threads as you can make some friends who are going through the same thing and buddy up to do the wait together. Good luck!