Aviza, It is perfectly normal and perfectly okay to masturbate and it doesn't matter where you are. You can still heal and recover if you are horny, being horny isn't synonymous with not getting better. I have three very basic needs sleep, food and sex; if I can't get sex you guessed it I take care of myself.
At the end of the day I don't measure my happiness or my unhappiness on getting any one of those three basic needs met. I measure my happiness based on how much I love and care for me. Why, yes, that could be construed as selfishness; however we are own best advocates at healing our emotions, bodies and minds.
So please hang in there and don't worry how horny you are or how much you are paddling the boat. Also if it is at all a shame thing, don't even be ashamed it part of normal human sexuality to masturbate and explore one's body. You can never feel shame, feel dirty or guilty for taking care of your basic needs.
Last thing don't jump into bed with the first "Joe Schmo" that shows you some attention. After my first marriage ended I had two mistresses, it was out of shallow want to be connected with someone; after a three year relationship. In my second marriage when that ended I waited two years before getting into any type of sexual relationship. I didn't even date anyone until this year and I have been divorced now for almost two years (separated for two and a half), this was after being with my ex for almost seven years.
I understand feeling lonely and wanting to be close to someone, especially because you have lost a bit of intimacy. I will say this it will get better, like I said hang in there. Grieve your loss, learn to forgive if you need to and be your own best friend.
I hope this helps you in some way. Adieu