Game not starting

I cant start minecraft, im getting the same message every time, even after setting my Jvm arguments to Xmx3G, can anyone help?

---- Minecraft Crash Report -------- Minecraft Crash Report ----// Don't do that.
Time: 2/13/19 8:48 PMDescription: Initializing game
java.lang.OutOfMemoryError: Java heap space at java.util.Arrays.copyOf(Arrays.java:3332) at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:137) at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:121) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:569) at java.lang.StringBuffer.append(StringBuffer.java:369) at java.io.BufferedReader.readLine(BufferedReader.java:370) at java.io.BufferedReader.readLine(BufferedReader.java:389) at org.apache.commons.io.IOUtils.readLines(IOUtils.java:1294) at org.apache.commons.io.IOUtils.readLines(IOUtils.java:1248) at org.apache.commons.io.IOUtils.readLines(IOUtils.java:1229) at bid.a(SourceFile:787) at bid.<init>(SourceFile:376) at bib.aq(SourceFile:443) at bib.a(SourceFile:404) at net.minecraft.client.main.Main.main(SourceFile:123)

A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
– Head --Thread: Client threadStacktrace: at java.util.Arrays.copyOf(Arrays.java:3332) at java.lang.AbstractStringBuilder.expandCapacity(AbstractStringBuilder.java:137) at java.lang.AbstractStringBuilder.ensureCapacityInternal(AbstractStringBuilder.java:121) at java.lang.AbstractStringBuilder.append(AbstractStringBuilder.java:569) at java.lang.StringBuffer.append(StringBuffer.java:369) at java.io.BufferedReader.readLine(BufferedReader.java:370) at java.io.BufferedReader.readLine(BufferedReader.java:389) at org.apache.commons.io.IOUtils.readLines(IOUtils.java:1294) at org.apache.commons.io.IOUtils.readLines(IOUtils.java:1248) at org.apache.commons.io.IOUtils.readLines(IOUtils.java:1229) at bid.a(SourceFile:787) at bid.<init>(SourceFile:376) at bib.aq(SourceFile:443)
– Initialization --Details:Stacktrace: at bib.a(SourceFile:404) at net.minecraft.client.main.Main.main(SourceFile:123)
– System Details --Details: Minecraft Version: 1.12.2 Operating System: Windows 10 (amd64) version 10.0 Java Version: 1.8.0_51, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 2113211936 bytes (2015 MB) / 3221225472 bytes (3072 MB) up to 3221225472 bytes (3072 MB) JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=532M IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0 Launched Version: 1.12.2 LWJGL: 2.9.4 OpenGL: ~_ERROR~ RuntimeException: No OpenGL context found in the current thread. GL Caps:  Using VBOs: ~_ERROR~ NullPointerException: null Is Modded: Probably not. Jar signature remains and client brand is untouched. Type: Client (map_client.txt) Resource Packs: ~_ERROR~ NullPointerException: null Current Language: ~_ERROR~ NullPointerException: null Profiler Position: N/A (disabled) CPU: <unknown>