Help girlfriend asked for space......ADVICE PLEASE

So my girlfriend of almost 6 months tells me a couple weeks ago she needed space. She works alot and she told me going into this her career means the world to her and i would never let her choose between the two and i havent. Well i backed off a little i dont pester her about sleeping together anymore i dont go down to her work as much but whenever we hang out at the end of the night i want her to stay over or all we had is dinner and she always has to go home and study or work and i get mad or dissapointed hoping for a guilt trip and she get frustrated i know she really stressed out on work and family stuff and studying and what not.....so we got into a fight (not yelling or screaming at one another) and she tells me that she doesnt think i can handle her working all the time and that she thinks she might need a break and i told her give me a week if things dont change we can take a break...so this last week i really backed off that happened last saturday. she went back home for fathers day as did i so then she called me Sunday night on her way back home and we talked the next night same thing left her alone didnt call text e-mail nothing she called me again... tuesday it was close to 11 i called her we talked samething wednesday night she called me we talked again thursday i caved and went down to her work because friday she was going out of town for the weekend and i didnt know if i was going to see her before she left so we talked for a little bit i asked her was she was doing that night she said she was going to go home and study and had to get her vehicle serviced before she left and she had to pack. I was like ok cool and she went and did her thing i went and did mine 10:30 rolls around im about ready to fall asleep so i call....no answer 11 oclock same thing no answer and i fall asleep the next day at 10 on my break i call her everything sounds good laughing i ask her if she zonked out on me she said yeah and i was like ok what did you all get done last night shes like well i got my vehicle serviced and then i met some friends down at a bar and I just played it cool and was like oh ok cool she said it was causal and i asked her what time she got home and it was around 12 i didnt say anything but wanted to freak out but kept my cool. I called her at 4 that day cause i told her i would call her later from before and we talked before she left. When she got to her destination she text me and told me she had made it to her destination i didnt respond it was late and i didnt want to make it seem like i was waiting around for a call or text. the next day saturday at around 4 in the afternoon she askes hows your day going about 2 hours later i text her back again didnt want to seem like i was waiting around i told her really good what are you girls up too...she said chilling by the pool...i said cool hows everyone doing how was the baby shower....no response....45 min later i give her a call on the second ring it goes straight to voice mail its now sunday at 8:45 and i havent heard from her...... and she should be on her way back tonight....WHAT DO I DO NOW.....i really want to make this work and its hard to hold back....no to call or text but im doing it so just need more insight PLEASE

Stop "caving in"! She is busy, remember?

do you think she could be testing me to see if ill really give her the space she wants by ignoring me more to see if ill call ?

talk to her and tell her that your going to respect her wishes and give he space then do exactly that she was honest with you with telling you she needs space you need to respect that or you could risk losing her forever! go out have fun with your friends get your own life and let her come to you! if she doesnt than you deserve better!