Wasn’t my month again. 😢😭

My period came...... this is month 4. I wouldn’t say I’m depressed but anything baby related saddens me. Me and my sister in law got pregnant at the same time. I miscarried and she didn’t. Every time I see her I’m reminded of where I would be in my pregnancy. Every time I see somebody pregnant I’m so jealous. Me and my hubby BD every other day until my period comes. I tired vitex, prenatal, folic acid and Vitamin B and I still get BFN😞. I’m at the verge of giving up. And just trying to adopt..... if anybody had and tips or tricks that worked for you could you tell me about them.